Gate Chemistry Sample Paper

1. The number of moles of solute present in 1000 ml of the water and aqueous solution are respectively called
a. Morarity & Morality
b. Morality & Molarity
c. Normality & Molarity
d. Normality & Molality
Ans: B

2. Boltzmann constant with respect to gas constant is
a. Gas constant for 100 molecules
b. Gas constant for 10 mole of gas
c. Gas constant for 1 mole only
d. Gas constant for 1 molecule only
Ans: D

3. When Fe(OH)3 sol is added to As2S3 sol, then
a. a new solution is formed
b. an emulsion is formed
c. an zoetrope is formed
d. flocculation takes place
Ans: D

4. The number of significant digits in 0.00002 and 20,000 respectively are
a. 1 and 5
b. 1 and 1
c. 5 and 1
d. 6 and 5
Ans: A

5. In fluorite structure, the arrangement of spheres is
a. acc
b. hcc
c. hcp
d. ccp
Ans: D

6. 1 mole of hydrated CuSO4 contains
a. 90 moles of water
b. 90 atoms of water
c. 90 g of water
d. 9 g of oxygen
Ans: C

7. During the extraction of Fe, slag obtained is
a. FeO
b. FeSiO3
c. MgSiO3
d. CaSiO3
Ans: D

8. Acetaminophen is a
a. analgesics
b. disinfectant
c. antipyretic
d. none of these
Ans: C

9. Joule - Thomson effect is zero in the case of
a. Real gas
b. Permanent gas
c. Ideal gas
d. Non ideal gas
Ans: C

10. The enthalpies of elements in their standard states are taken as zero. Hence the enthalpy of formation of a compound
a. should always be negative
b. should always be positive
c. will be equal to twice the energy of combustion
d. may be positive or negative
Ans: D