An organic compound containing C and H has 92.3% of carbon, Its empirical formula is:
A. CH
B. CH3
C. CH2
D. CH4
x grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28g. What is the value of x (in grams)
A. 44
B. 200
C. 150
D. 50
0.84 g of metal carbonate reacts exactly with 40 mL of N/2 H2S04. The equivalent weight of the metal carbonate is :
A. 84g
B. 64g
C. 42g
D. 38g
Assertion (A) : Equal moles of different substances contain same number of constituent particles.Reason (R) : Equal weights of different substances contain the same number of constituent particles.The correct answer is
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not correct explanation of (A)
C. (A) is true, but (R) is false
D. (A) is not true, but (R) is true
138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is
A. 3:4
B. 1:2
C. 1:4
D. 1:1
1.5 g of CdCl2 was found to contain 0.9 g of Cd. Calculate the Atomic weight of Cd
A. 118
B. 112
C. 106.5
D. 53.25
One mole of fluorine is reacted with two moles of hot concentrated KOH. The products formed are KF, H2O and O2. The molar ratio of KF, H2O and O2 respectively is
A. 1:1:2
B. 2:1:0.5
C. 1:2:1
D. 2:1:2
X liter of carbon monoxide is present at STP. It is completely oxidized to CO2. The volume of CO2 formed is 11.207 litres. What is the value of X in litres
A. 22.414
B. 11.207
C. 5.6035
D. 44.828
What is the volume (in litres) of oxygen required at STP to completely convert 1.5 mol of sulpher into sulpher dioxide
A. 11.2
B. 22.4
C. 33.6
D. 44.8
A metal nitride contains 28% nitrogen by weight. The molecular formula of metal nitride is M3N2 What is the atomic weight of metal
A. 72
B. 64
C. 100
D. 24
How many litres of oxygen (at STP) are required for complete combustion of 39 g of liquid benzene?(Atomic weights: C = 12, O = 16, H = 1)
A. 84
B. 22.4
C. 42
D. 11.2
One mole of N2H4 loses 10 moles of electrons to form a new compound Z.Assuming that all the nitrogens appear in the new compound, what is the oxidation state of nitrogen in Z? (There is no change in the oxidation state of hydrogen)
A. -1
B. -3
C. +3
D. +5