1. Choose the correct alternative that will continue the same pattern and fill in the blank spaces. 2,
7, 14, 23, —–, 47
(a) 34 (b) 31 (c) 38 (d) 27 (e) None of these
Answer: A
2. It is postulated that huge deposits of NaCl (rock salt) and CaCO3 (chalk and marble) are sites of
erstwhile oceans, where the salts had been concentrated through weathering by rain and wind and
leaching by rivers. Select the correct explanatory statement in this context.
(a) Both NaCl and CaCO3 are highly soluble in water.
(b) NaCl is soluble in water but CaCO3 is not. Hence, concentration of CaCO3 in the oceans
through weathering is an untenable hypothesis.
(c) The solubility of CaCO3 in water is pH dependent and is enhanced by acidic atmospheric gases.
Hence, CaCO3 may be leached into water during weathering.
(d) NaCl and CaCO3 are igneous rocks and have crystallized as such during the slow cooling
process when the earth was born. Hence, the ocean postulates is baseless.
Answer: C
3. A known positive charge is located at point P as shown above, between two unknown charges, Q1
and Q2. P is closer to Q2 than Q1. If the net electric force acting on the charge at P is zero, it may
correctly be concluded that:
(A) Both Q1 and Q2 are positive
(B) Both Q1 and Q2 are negative
(C) Q1 and Q2 have opposite signs
(D) Q1 and Q2 have the same sign, but magnitude of Q1 is greater than the magnitude of Q2
Answer: D
4. If log2 = 0.30103 and log3 = 0.4771, find the number of digits in (648)5.
(a) 23. (b) 15. (c) 13. (d) 14. (e) 22.
Answer: B
7, 14, 23, —–, 47
(a) 34 (b) 31 (c) 38 (d) 27 (e) None of these
Answer: A
2. It is postulated that huge deposits of NaCl (rock salt) and CaCO3 (chalk and marble) are sites of
erstwhile oceans, where the salts had been concentrated through weathering by rain and wind and
leaching by rivers. Select the correct explanatory statement in this context.
(a) Both NaCl and CaCO3 are highly soluble in water.
(b) NaCl is soluble in water but CaCO3 is not. Hence, concentration of CaCO3 in the oceans
through weathering is an untenable hypothesis.
(c) The solubility of CaCO3 in water is pH dependent and is enhanced by acidic atmospheric gases.
Hence, CaCO3 may be leached into water during weathering.
(d) NaCl and CaCO3 are igneous rocks and have crystallized as such during the slow cooling
process when the earth was born. Hence, the ocean postulates is baseless.
Answer: C
3. A known positive charge is located at point P as shown above, between two unknown charges, Q1
and Q2. P is closer to Q2 than Q1. If the net electric force acting on the charge at P is zero, it may
correctly be concluded that:
(A) Both Q1 and Q2 are positive
(B) Both Q1 and Q2 are negative
(C) Q1 and Q2 have opposite signs
(D) Q1 and Q2 have the same sign, but magnitude of Q1 is greater than the magnitude of Q2
Answer: D
4. If log2 = 0.30103 and log3 = 0.4771, find the number of digits in (648)5.
(a) 23. (b) 15. (c) 13. (d) 14. (e) 22.
Answer: B
