SMATEE TEST SERIES 15 CHEMISTRY

1. The IUPAC symbol for the element Dubnium  is

a) Uno
b) Uue
c) Unp
d) Uns

2. Which of the following has maximum bond angle ?

a) CO₂
b) H₂O
c) NH₃
d) PF₅

3. Match List 1 and List 2

   List 1                      List 2

1. BrF₅                Square Pyramidal
2. NH₄⁺             Tetrahedral
3. BF₃                 Trigonal Bipyramidal
4. SbCl₅              Trigonal Planar

a) 1 – i, 2- ii, 3- iii, 4- iv
b) 1- i, 2- ii, 3- iv, 4- iii
c) 1- iv, 2- iii, 3- ii, 4- i
d) 1-iii, 2- ii, 3- iv, 4- i

4. Choose the incorrect order among the following :

a) Li₂O < Na₂O < K₂O (Basicity)
b) Al₂O₃ < SiO₂ < P₂O₅ (Acidity)
c) B₂O₃ < Al₂O₃ < Ga₂O₃ < In₂O₃ (Acidity)
d) P₂O₅ > SO₃ > Cl₂O₇ (Basicity)

5. Which of the following is incorrect about Ionization enthalpy?

a) IE₁ of Be > IE₁ of B
b) IE₁ of Na < IE₁ of Mg
c) IE₂ of Mg > IE₂ of Al
d) IE₃ of Na < IE₃ of Mg

6. Which of the following represents the electronic configuration of the most electropositive element ?

a) [Ne] 3s
b) [Ne] 3s² 3p¹
c) [Xe] 6s¹
d) [Xe] 6s²

7. The natural occurring radioactive is

a) Uranium and Thorium
b) Uranium and Plutonium
c) Uranium and Neptunium
d) Thorium and Plutonium

8. An element ‘P’ has atomic number 19.What would be the formula of its oxide?

a) X₂ O
b) P₂O
c) PX₃
d) P₂X₃

9. Which one of the following is the correct order of size of the iodine species?

a) I > I⁺> I^–
b) I > I^– > I⁺
c) I⁺ > I^– > I
d) I^– > I > I⁺

10. A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in the internal energy in Joule is?

a) -50
b) 50               
c) 100
d) -175

11. Match list II and List II


A) (a) – (i), (b) – (ii), (c) – (iv), (d) – (iii)
B) (a) – (i), (b) – (iii), (c) – (iv), (d) – (ii)
C) (a) – (ii), (b) – (iii), (c) – (iv), (d) – (i)
D) (a) – (ii), (b) – (iii), (c) – (i), (d) – (iv)

12. In adiabatic reversible conditions, 1 mole of CO₂ gas at 300 K is expanded such that its volume becomes 27 times. Then the work done is? (C_v = 6 cal/mol and γ = 1.33)

a) 900 cal
b) 1000 cal     
c) 1200 cal
d) 1400 cal 

13. What is the value of γ for monoatomic gas (ideal gas)?

a) 7/5
b) 4/3              
c) 5/2
d) None of these

14. ∆H and ∆U for the reaction, Fe₂O₃ (s) + 3H₂ (g) ⇢ 2Fe (s) + 3H₂O (l); at constant temperature are related as

(a) ∆H = ∆U
(b) ∆H = ∆U + RT
(c) ∆H = ∆U + 3RT
(d) ∆H = ∆U – 3RT

15. If 10 kJ of work is done on the system then 2 kcal heat is released by the system then change in internal energy is? (1cal = 4.2 J)

a) 1.6 J
b) 1600 J         
c) 1.6 cal
d) 1600 cal      

16. One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 L to 10 L. The ∆E for this process is?

a) 1381.1 cal
b) 163.7 cal
c) zero
d) 9 atm L

17. In which case change in entropy is negative?

a) Sublimation of solid to gas
b) 2H(g)→H₂(g)
c) Evaporation of water
d) Expansion of a gas at constant temperature

18. For irreversible expansion of an ideal gas under isothermal condition, the correct option is:

a) ΔU = 0, ΔStotal ≠ 0
b) ΔU ≠ 0, ΔStotal = 0
c) ΔU = 0, ΔStotal = 0
d) ΔU ≠ 0, ΔStotal ≠ 0

19. The less reactivity of chlorine atom in CH₂ = CH -Cl is due to

a) inductive effect
b) resonance stabilisation
c) electromeric effect
d) electronegativity

20. Sublimation is a process where a solid

a) melts
b) changes into liquid form
c) boils
d) changes into vapour form directly.