191: Sparkling red colour after the blast of fire crackers is due to the presence of:
(a) Strontium
(b) Sodium
(c) Sulphur
(d) Magnesium
192: Match List I with List II and select the correct answer using the codes given below the lists :
List I------------- List II
I. Blue vitriol (A) Sodium bicarbonate
II. Epsom salt (B) Sodium hydroxide
III. Baking soda (C) Magnesium sulphate
IV. Caustic soda (D) Copper sulphate
Codes:
(a) I-C, II-D, III-B, IV-A
(b) I-D, II-C, III-C, IV-A
(c) I-C, II-D, III-A, IV-B
(d) I-D, II-C, III-A, IV-B
193: Assertion (A) :
Formic acid is a stronger acid than acetic acid.
Reason (R):
Formic acid is an organic acid.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is NOT a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
194: Which one of the following antimicrobial drugs is suitable for treatment of both tuberculosis and leprosy ?
(a) Isoniazid
(b) P-aminosalicylic acid
(c) Streptomycin
(d) Rifampicin
Explanation:
Rifampicin an antimicrobial drug is suitable for treatment of both tuberculosis and leprosy.
195: The chief ingredient of the mosquito repellent cream is derived from:
(a) Tulsi
(b) Neem
(c) Lemon
(d) Rice bran