1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
RNA and DNA are chiral molecules, their chirality is due to
A
chiral bases
B
chiral phosphate ester units
C
$$D$$-sugar component
D
$$L$$-sugar component
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In the reaction :
AIPMT 2007 Chemistry - Alcohol, Phenols and Ethers Question 32 English
Which of the following compounds will be formed?
A
AIPMT 2007 Chemistry - Alcohol, Phenols and Ethers Question 32 English Option 1
B
AIPMT 2007 Chemistry - Alcohol, Phenols and Ethers Question 32 English Option 2
C
AIPMT 2007 Chemistry - Alcohol, Phenols and Ethers Question 32 English Option 3
D
AIPMT 2007 Chemistry - Alcohol, Phenols and Ethers Question 32 English Option 4
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol$$-$$1, the lowering in freezing point of the solution is
A
0.56 K
B
1.12 K
C
$$-$$ 0.56 K
D
$$-$$ 1.12 K
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In a first-order reaction A $$ \to $$ B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is
A
$${{\log 2} \over k}$$
B
$${{\log 2} \over {k\sqrt {0.5} }}$$
C
$${{\ln 2} \over k}$$
D
$${{0.693} \over {0.5k}}$$