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Question 1/30
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The property of carbon atom to bond with other atoms of carbon giving rise to long chains of carbons is known as:
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Question 2/30
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If the acceleration due to gravity on the surface of the earth is g, then the acceleration due to gravity on the surface of a planet whose mass is half of that of earth and radius is same as that of the earth is _________.
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Question 3/30
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Which of the following is law of chemical combination?
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Question 4/30
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When lead nitrate is heated, the brown fumes observed are of:
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Question 5/30
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A fuse wire should have
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Question 6/30
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Let “t” be the time during which a charge “Q” flows through a resistor R having potential difference V across its ends. The power dissipated is given by:
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Question 7/30
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Which part of human ear converts sound vibrations into electrical signals
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Question 8/30
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Calcium oxide reacts with water to form calcium Hydroxide. Which type of reaction is this?
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Question 9/30
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Isotopes of an element have
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Question 10/30
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If the following equation is balanced, the value of “b” is:
a Al + b HCl → c AlCl
3 + d H
2
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Question 11/30
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Which of the following is the correct order of reactivity of metals?
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Question 12/30
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Current flows due north in a horizontal transmission line. Magnetic field at a point vertically above it, is directed
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Question 13/30
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Which would require a greater force accelerating a body A with 2 kg mass at 5 m/s2 or a body B with 5 kg mass at 2 m/s2
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Question 14/30
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Light enters the eye through a transparent membrane known as
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Question 15/30
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In a homologous series of as the molecular mass increases which of the following statements is true:
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Question 16/30
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The substances whose odour changes in acidic or basic media are called:
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Question 17/30
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A rider on horseback falls back when the horse starts running suddenly is because:
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Question 18/30
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Atomic mass unit is defined in terms of which of the following?
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Question 19/30
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Two bodies A and B have velocities in the ratio of 2: 1. Mass of body A is half of the mass of body B. The kinetic energy of A and B are in the ratio of
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Question 20/30
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Which one of the following is Dobereiner’s triad?
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Question 21/30
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Which of the following is common in all acids?
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Question 22/30
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In Modern Periodic Table, the atomic radius increases ________.
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Question 23/30
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If the reading of ammeter is 2 A then reading of voltmeter is:
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Question 24/30
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The force of gravitation between two bodies of mass 1 kg each kept at a distance of 1 m is:
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Question 25/30
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Which of the following will turn blue litmus red?
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Question 26/30
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A body is thrown vertically upward with velocity u, the greatest height ‘h’ to which it will rise is:
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Question 27/30
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A particle is moving in a circular path of radius r, the displacement after half a circle would be:
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Question 28/30
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A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens?
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Question 29/30
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The total energy of freely falling object:
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Question 30/30
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Which of the following metal oxide is amphoteric in nature?