Chemistry online MCQ Test 11 April

Chemistry MCQ Test (20 Questions)

1. Same number of carbon atoms as 6g of carbon-12 is present in
7.5 g ethane
8 g methane
both (a) and (b)
none

2. Same % of carbon as ethylene is in
Propene
Ethyne
Benzene
Ethane

3. Standard for atomic mass is
C-12
C-13
C-14
None

4. Heisenberg uncertainty principle expression
ΔxΔp ≥ h/4π
ΔxΔv ≥ h/4πm
ΔEΔt ≥ h/4π
ΔEΔx ≥ h/4π

5. Second most electronegative element
Chlorine
Fluorine
Oxygen
Sulphur

6. Screening effect order
s > p > d > f
s > p > f > d
f > d > p > s
f > p > s > d

7. Metallic character trend
decreases across period, increases down group
increases across period, decreases down group
increases both
decreases both

8. Electron affinity trend
increases
decreases
constant
random

9. Diagonal relationship pair
Be & Mg
Li & Mg
Be & B
Be & Al

10. Heavy water is used as
moderator
coolant
both
none

11. Water is
acidic oxide
basic oxide
amphoteric
none

12. Highest hydration energy
MgCl2
CaCl2
BaCl2
SrCl2

13. Solubility of carbonates order
Mg>Ca>Sr>Ba
Ba>Sr>Ca>Mg
Ca>Ba>Sr>Mg
none

14. Milk of lime is
CaO
Ca(OH)2 suspension
CaCO3
none

15. Gypsum formula
CaSO4·2H2O
CaSO4·1/2H2O
CaCO3
none

16. Least thermally stable carbonate
K2CO3
Na2CO3
BaCO3
Li2CO3

17. Ideal gas pressure change (T & V doubled)
4P
2P
P
3P

18. Most easily liquefiable gas
P
Q
R
S

19. Maximum deviation from ideal gas
CH4
NH3
H2
N2

20. Density of N2 at given condition
1.40 g/L
2.81 g/L
3.41 g/L
0.29 g/L