Please wait...
LPU University Admission 2025 - 100% Scholarship - Apply Now Check Here
UPES University Admission 2025 - 100% Scholarship - Apply Now Check Here
Mass of methane required to produce 22g of CO2 after complete combustion is g.
(Given Molar mass in g mol-1 C = 12.0 H = 1.0 O = 16.0)
[27-Jan-2024 Shift 1]
9.3g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide produced if the reaction is 100% completed is ____× 10−1g. (Given molar mass in gmol−1N : 14, O : 16, C : 12, H : 1)
[27-Jan-2024 Shift 2]
1 mole of PbS is oxidised by "X" moles of O3 to get "Y" moles of O2. X + Y =
0.05cm thick coating of silver is deposited on a plate of 0.05m2 area. The number of silver atoms deposited on plate are _____× 1023. (At mass Ag = 108, d = 7.9gcm−3)
[30-Jan-2024 Shift 1]
Number of moles of methane required to produce 22gCO2(g) after combustion is x × 10−2 moles. The value of x is
[31-Jan-2024 Shift 1]
A sample of CaCO3 and MgCO3 weighed 2.21g is ignited to constant weight of 1.152g. The composition of mixture is :
(Given molar mass in gmol−1
CaCO3 : 100, MgCO3 : 84)
[31-Jan-2024 Shift 2]
The molarity of 1L orthophosphoric acid (H3PO4) having 70% purity by weight (specific gravity 1.54gcm−3) is______ M.
(Molar mass of H3PO4 = 98gmol−1)
Consider the following reaction:
3PbCl2 + 2(NH4)3PO4 ⟶ Pb3(PO4)2 + 6NH4Cl
If 72mmol2 of PbCl2 is mixed with 50mmol of (NH4)3PO4, then amount of Pb3(PO4)2 formed is ______mmol. (nearest integer)
[1-Feb-2024 Shift 1]
10mL of gaseous hydrocarbon on combustion gives 40mL of CO2(g) and 50mL of water vapour. Total number of carbon and hydrogen atoms in the hydrocarbon is____
[1-Feb-2024 Shift 2]