Na₂ SO₄ xH₂O on heating loses 55.9% of its weight, value of x is.

1 L of an unknown gas at NTP weighs 1.97g, formula of the gas may be

Number of radial nodes for 3d orbital is

Which of the following transitions will emit photon with minimum wavelength?

For a gas at 273 K and 20 at m, molar volume is 20 percent greater than that for an ideal gas under similar conditions. The correct statement about the gas and its compressibility factor (Z) is

A certain gas takes four times as long to effuse out as helium under similar conditions. The molecular mass of gas will be

At 298 K, a gas expands 0.1 L to 0.4 L against a constant pressure of 20 atm. The work done during the process is (given: 1 L atm = 100 J)

Two moles of an ideal gas expanded spontaneously into vacuum. The work done will be

Molecule with sp³d hybridised central atom is

Select the molecule/ion having highest bond order among the following

Suitable pH range maintained in the above reaction to get a better yield is

Glucose  Product formed is

Water soluble vitamin is

Caprolactam is the monomer of

Which of the following artificial sweeteners does not contain an amide linkage?

Molar conductivities  at infinite dilution of NaCI, HCI and CH₃COONa are x, y and z Respectively  for CH₃COOH will be  

Total charge required to reduce 1 mole of Cr₂ O₇²⁻ to Cr³⁺ ions is

For a reaction 2A + B → product , rate law is given as r = K[A]¹ [B]^1/2 . What will be the order of reaction if A is taken in excess?

Eo values of Li ⁺ Li , Pb⁺² / Pb , Cu⁺² / Cu , and Sn²⁺ / Sn are -3.05 V, -0.13 V, +0.34 V and -0.14 V respectively. Least reducing power is of

Effective number of atoms in fcc unit cell is

The maximum power to precipitate CdS sol is of

Van’t Hoff factor for aqueous Na₂SO₄ solution with degree of ionisation α = 0.75 is

The species which will not undergoes disproportionation is

The method used to remove temporary hardness is

The element which will not impart colour to flame is

The mixture of gases which is known as producer gas is

The pH of a solution at 25^oC that contains 10^-2 M OH^- is

The IUPAC name of the compound

Among the following aromatic species is

CH₃ - CH₂ - CHO and CH₃ - CO - CH₃ are

In the molecule, The hybridisation of C₁, C₃ and C₅ respectively are

During estimation of nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 1g of the compound is neutralized by 20 mL of 0.5 M H₂SO₄. The percentage of nitrogen in the compound is

Meta-directing group towards electrophilic substitution reaction in benzene is

In Li₂O, having the antifluorite structure, the coordination numbers for ^2- ions Li⁺ ions respectively are

In the following balanced equation,  ratio of b to c is 

Ortho and para hydrogen differ in

20 volume H₂O₂ solution has its strength

Most soluble hydroxide in water is

Select the correct match regarding composition of Portland cement

Number of Boron atom(s) having SP³ hybridisation in borax molecule is

0.5 g of an organic substance was kjeldahlised and the ammonia released was neutralised by 100 ml 0.1 M HCI. Percentage of nitrogen in the compound is

In the following table, identify the correct matching of the crop, its disease and the corresponding pathogen

Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?

Quiescent centre is found in root. The concept of quiescent centre was proposed by

Ploidy of ovary, anther, egg, pollen, male gamete and zygote is respectively:

Cells, which lack nucleus are

Identify the incorrect statement.

During which stage of mitosis does the nuclear envelope begin to disappear?

The enzyme used for joining two DNA fragments is called:

Identify the covering layer of fasciculi of muscles

During double fertilisation inplants, one spermfiises with the egg cell and the other sperm fuses with:

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridised, then F₂-segregation will show

Nitrogen fixation is a process of

Green manure plant belongs to

Man, in the lifecycle of Plasmodium, is

The diagram shows an important concept of genetic implication of DNA. Fill in the blanks A to C

Increase in the level of greenhouse gases is because of:

A bnormald evelopment of spinal cord is

Which of the following is incorrect match of animal group/life style/stracture/function?

Which of the following enzyme is called regulatory enzyme of glycolysis?

A gene pair hides the effect of another gene. The phenomenon is known as:

According to widely accepted ‘fluid mosaic model’, cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

Which of the following is incorrect?

The spines present in water chestnut (Trapa) are the modification of persistent

Which of the following pairs ofthe cell structures are important for determining the movement of molecules in or out of the plant cell?

At menopause there is rise in urinary excretion of

Pteridophytes differ from mosses in possessing

Which of the following is not correctly matched?

Which one of the following is an environment related disorder with the correct main cause?

Which one of the following statement pertaining to plant structure is correct?

The outer layer of vacuole is called:

Select the false Statement.

Bulk flow of substances over the longer distances through the vascular tissue is called

Consider the following statements

I. C₄ species have greater rate of CO₂ assimilation than C₃ species.
II. CO₂ compensation point is very high in C₄ plants.
III. The process of photorespiration involves the chloro plasts, peroxysomes and mitochondria.

Which of the statements given above are correct?

All of the following are included under in situ conservation except

How would the daughter cells at the end of mitosis and cytokinesis compare with the parent cell when it was in G₁ of the cell cycle?

Gel electrophoresis is used for

A 12 year old boy, whose body mass index BM₁ is 18.5, starts complaining of stomach-ache on every Monday morning. His doctor has not found any organic cause despite of all investigations. What may be the cause of this abdominal pain

Which of the following is considered a hot spot of biodiversity in India?

Which one of the following human genes has the longest stretch of DNA (-24 Mb)?

Which of the following primate is the closest relative of humans?

In DNA of E. coli has 20% bases of guanine: What will be fraction of thymine?

Classification of Porifera is based on

Match the following columns.

Codes:

A cricket player is fast chasing a ball in the field. Which one of the following groups of bones is directly contributing in this movement?

The essential chemical components of many coenzymes are

Which ion is essential for muscle contraction?

Tracheids differ from other tracheaiy element in

Which one of the following shows concept of species-area relationship?

Osphradium is meant for

Select the correct match of the source gland with its respective hormone as well as the function.

DNA forms the chemical or molecular basis of heredity. The above statement was given in accordance with the result of experiment conducted by

In the chemistry of vision in mammals, the photosensitive substance is called

Which of the following characteristic does not occur in Pinus?

The kind of epithelium which forms the inner walls of blood vessels is

A man with blood group AB, marries a woman with ‘O’ blood group. Which of the following blood group (s) can be found in their progeny?
I. A
II. B
III. O
IV. AB

The most important component of the oral contraceptive pills is:

Which of the following statements is correct for Cro-magnon man?

A bicpllateral vascular bundle has which of the following arrangement of tissues?

First reaction in photosynthesis is

What was the most significant trend in evolution of modern man (Homo sapiens) from his ancestors?

I. Initial CO₂ acceptor
II. Extent of photorespiration
III. Enzyme catalysing reaction that fixes CO₂
IV. The presence of Calvin cycle
V. Leaf anatomy

Which one does not differ in a C₃ and C₄-plants?

Which one of the following correctly represents the normal adult human dental formula?

The correct floral formula of chilli is

The function of rennin is

During photorespiration, the conversion of phosphoglycolate to glycolate takes place in which cell organelle?

Which one of the following is an Indian medicinal plant?

Pentamerous, actinomorphic flowers, bicarpellary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of

Reproductive health in society can be improved by -

(i) Introduction of sex education in schools
(ii) Increased medical assistance
(iii) Awareness about contraception and STDs
(iv) Equal opportunities to male and female children
(v) Ban on aminocentesis
(vi) Encouraging myths and misconceptions

Which of the following is not a phylloclade?

Which of the following bacteria carry out oxygenic photosynthesis by means of a photosynthetic apparatus similar to the eukaryotes?

Taxonomic hierarchy refers to one of the following statement.

It is important that certain free ribosomes bind to the outer surface on the endoplasmic reticulum (ER) in order to complete their protein synthesis because:

Cycas and Adian tum resemble each oth er in having

Industrial waste containing non-biodegradable substance left in a pool of water and a person eating a fish of that water, showing signs of toxicity is a typical example of:

Lamellae of Haversian canals contain

Which one of the following combination is incorrect?

Fossils of ancestor of man found in Shivalik hill are

It is commonly said that ladies are protected from heart attacks in reproductive period i.e., from puberty to menopause because:

Consider the following statements.

I. In cyclic photophosphorylation, oxygen is not released and NADPH is also not produced.
II. Photosynthesis in C4-plants is relatively less limited by atmospheric carbon dioxide levels because the primary fixation of carbon dioxide is mediated via PEP carboxylase.
III. The portion of the spectrum between 100-200 nm is also referred to as Photosynthetically Active Radiation (PAR).

Obstacle to large scale transplantation of organs is

The presence of epiphytic roots is the characteristic feature of

Human insulin is being commercially produced from a transgenic species of

Outer limiting layer of mycoplasma is layer

Which of the following is incorrectly matched?

A person is gaining weight day-by-day and he always has the feeling of letharginess. One of the most probable cause is

Match column-I with column-II and choose the correct option.

In females, inhibin is secreted by

Which of the following group of kingdom protista is being described in the statements given below?

(i) This group includes diatoms and golden algae.
(ii) They are microscopic and float passively in water currents (plankton).
(iii) Most of them are-photosynthetic.
(iv) They have deposits in their habitat; this accumulation over billion of years is referred to as ‘diatomaceous earth’.

Fern prothallus produces

Which one of the following group of codons is called termination codon?