The following reaction is given :
\[CH_3-CH(Br)-CH(Br)-CH_3 \xrightarrow[\Delta]{2 NaNH_2} A\]
Identify \(A\) from the following:

Match List - I with List - II.

List - I	List - II
(A) Oxalic acid	(I) Hexane-1,6-dioic acid
(B) Acetophenone	(II)Ethane-1,2-dioic acid
(C) Phthalic acid	(III) Benzene-1,2-dicarboxylic acid
(D) Adipic acid	(IV) \(\Delta T_b=k_b m\)

Choose the correct answer from the options given below :

Which of the following is NOT a disaccharide?

Read the passage carefully and answer the questions
The coordination compounds are of great importance. These compounds are widely present in the mineral, plants and animal world and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems, industry and medicine. For example, coordination compounds find use in many qualitative and quantitative chemical analysis. Some important metal extraction and purification make use of complex formation. Hardness of water can be estimated by stable complex formation of Ca\(^{2+}\) and Mg\(^{2+}\)
From which coordination complex, gold is recovered by reducing this complex with Zn ?

Which of the following reagents can be used to convert Ethanol to Ethanal?
(A) Chromium trioxide in Pyridine and HCI
(B) Heated Copper at 573 K
(C) Anhydrous Chromium trioxide
(D) Acidic KMnO\(_4\)
Choose the correct answer from the options given below:

Arrange the following electrolytes in the increasing order of van't Hoff factor (i) for complete dissociation of solute.
A. \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
B. \(MgCl _2\)
C. \(K _4\left[ Fe ( CN )_6\right]\)
D. KCl
Choose the correct answer from the options given below:+

Arrange the following in order of increasing boiling points.
(A) Bromomethane
(B) Bromoform
(C) Chloromethane
(D) Dibromomethane
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P, Q, R and S are four wires of resistances 3, 3, 3 and 4 \(\Omega\) respectively. They are connected to form the four arms of a wheatstone bridge circuit. The resistance with which S must be shunted in order that the bridge may be balanced is :

The order of \(\sqrt{1+\left(\frac{d y}{d x}\right)^2}=\left[a \frac{d^2 y}{d x^2}\right]^{\frac{1}{3}}\) is

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon which can be expressed by means of an empirical relationship know as Freundlich Adsorption isotherm. The relationship given by \(\frac{x}{m} = Kp^{\frac{1}{n}}\ (n > 1)\)
x = Mass of the gas adsorbed
m = Mass of adsorbent
p = Pressure at which adsorption takes place
K and n are constant
Which electrolyte/electrolytes can coagulate a ferric hydroxide sol most effectively?
A. \(K _3\left[ Fe ( CN )_6\right]\)
B. \(Na _3 PO _4\)
C. \(Na _2 SO _4\)
D. \(KNO _2\)
E. KI
Choose the correct answer from the options given below:

The probability that it will rain on any particular day is \(50 \%\). The probability that it rains only on the first 4 days of the week is :

If \(\theta\) is the angle between the vectors \(2\hat{i} - 2\hat{j} + 4\hat{k}\) and \(3\hat{i} + \hat{j} + 2\hat{k}\), then value of \(\sin \theta\) is:

Which one of the following hormones is not secreted by the placenta?