Question 1(a) (i) ( 1.0 marks)
Select the correct answer from the choices A, B, C, D, which are given. Write down the letter corresponding to the correct answer.
(i) To which group of the periodic table does sodium belong?
(A) Alkaline earth metals
(B) Alkali metals
(C) Halogen group
(D) Noble gases
(B) Sodium belongs to alkali metal group.
Question 1(a) (ii) ( 1.0 marks)
Which of the following statements is not true for covalent compounds?
(A) Non-polar covalent bond is formed in CH4.
(B) Polar covalent bond is formed in H-S-H.
(C) The formation of covalent bond between two neutral atoms depends on their ability to form cations and anions.
(D) No actual transfer of electrons takes place during the formation of covalent bond.
Covalent bond is formed between two elements in their gaseous states by sharing of electrons. Therefore, cation and anion formation is not required.
Question 1(a) (iii) ( 1.0 marks)
Which of the following is not an organic acid?
(A) Tartaric acid
(B) Sulphuric acid
(C) Citric acid
(D) Butyric acid
Sulphuric acid is a mineral acid.
Question 1(a) (iv) ( 1.0 marks)
Which of the following is a double salt?
(B) Fe SO4. (NH4)2 SO4. 6H2O
(D) K2 [HgI4]
A double salt is produced by the crystallisation of two simple salts from a mixture of their saturated solution.
Question 1(a) (v) ( 1.0 marks)
Which of the following is a weak electrolyte?
The electrolytes which allow very small amount of current to flow through them are called weak electrolytes.
Question 1(a) (vi) ( 1.0 marks)
The acid which gives white precipitates both with barium chloride and lead acetate solution is
(A) dilute HCl
(B) dilute HNO3
(C) dilute H2SO4
(D) dilute H3PO4
White precipitates of barium sulphate and lead sulphate are formed in both the cases.
Question 1(a) (vii) ( 1.0 marks).
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