Chemistry | General Stream | MCQ | Question Paper 2081-2024 of Class 12 | NEB

Group 'A' [11x1=1]

Rewrite the correct options of each questions in your answer sheet.

1. What is the molarity of 0.4 N Na₂CO₃ solution?

A) 0.1 M
B) 0.2 M
C) 0.4 M
D) 0.8 M

2. Which of the following will have highest pH in water solution ?

A) NaCl
B) Na₂CO₃
C) KCl
D) CuSO₄

3. What kind of battery is used in a laptop computer and mobile phone ?

A) Li-ion battery
B) Dry cell battery
C) Fuel cell battery
D) Simple cell battery

4. What is the enthalpy change in the reaction, 2CO+O₂ →2CO₂ called?

A) Enthalpy of combustion
B) Enthalpy of formation
C) Enthalpy of fusion
D) Enthalpy of reaction

5. Which one of the following complex ions gives tetrahedral geometry ?

A) [Ni (CN)₄ ]2-
B) [NiCl₄]2-
C) [PtCl₄]2-
D) [CoF₆]3-

6. Which of the following molecules does not act as a ligand ?

A) CO₂
B) NH₃
C) H₂O
D) CO

7. Which of the following is used to convert > C= O group to -CH₂- ?

A) Ni/ H₂ /
B) LiAlH₄ /
C) Zn-Hg/ HCl /
D) Pd/ H₂ /

8. Benzoic acid gives benzene on being heated with 'X' and phenol gives benzene on being heated with 'Y'. Therefore, X and Y are respectively:

A) Sodalime and copper
B) Zn dust and NaOH
C) Zn dust and sodalime
D) Sodalime and Zn dust

9. CH₃Cl —Alc. AgCN→(A) —LiAlH₄ →(B), what would be the product B ?

A) Methanamine
B) Ethanamine
C) N - methyl methanamine
D) N-methyl ethanamine

10. When the compound sodium ethoxide reacts with chloroethane, it gives the compound C₄H₁₀O. What reaction is this ?

A) Wurtz's reaction
B) Williamson's synthesis
C) Rosenmund's reduction
D) Dehydrohalogination reaction

11. What would be the product when ketone is treated with Grignard's reagent?

A) Primary alcohol
B) Secondary alcohol
C) Tertiary alcohol
D) Methyl alcohol

Chemistry General Stream MCQ Question Paper 2081-2024 of Class 12 NEB.

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