Match List-I with List-II 

List-I	List-II
(A) Williamson's synthesis.	\((I)\) \(C _6 H _5 Cl + NaOH \xrightarrow[\text { High pressure }]{350^{\circ} C }\)
(B) Reimer Tiemann reaction.	\((II)\) \(C _6 H _5 OH + C _6 H _5 COCl \xrightarrow{\text { aq. } NaOH }\)
(C) Dow's process	\((II)I\) \(CH_3 CH_2 ONa+CH_3 Cl \xrightarrow{\text { heat }}\)
(D) Schotten Baumann reaction	\((IV)\) \(C _6 H _5 OH + CHCl _3+ NaOH \xrightarrow{\text { heat }}\)

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Which of the following compounds will not give azo coupling reaction with benzene diazonium chloride?

Answer the question on the basis of passage given below :
A colloid is a heterogeneous system in which a substance is dispersed (dispersed phase) as fine particles in another substance called dispersion medium.
Their particle size is intermediate between that of pure solutions (less than 1 nm) and suspensions (greater than 1000 nm).
They are known for interesting properties such as enormous surface area,
Tyndall effect, Brownian motion etc.
They are widely used in industries and day to day life.
Some prominent uses of colloids are those in smoke precipitators, purification of water, medicines, cleansers etc.
Which of the following is true for enzyme catalytic reaction?

Identify the given name reaction :
\(R-NH_2+CHCl_3+3 KOH \xrightarrow{\text { Heat }} R-NC+3 KCl+3H_2 O\)

Ethylene glycol and terephthalic acid are the monomeric unit for the formation of

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon and it differs from absorption which occurs throughout the body of the substance that absorbs. In physiosorption the attractive forces are mainly van der Waal's forces while in chemisorption ionic/covalent bonds are formed between particles of adsorbent and adsorbate. The catalytic activity of finely divided iron in Haber's process of ammonia manufacture can be explained by adsorption theory. Adsorption being an exothermic process, the heat of adsorption is utilised in enhancing the rate of the reaction. Adsorption has many applications being used in gas masks, control of humidity, chromatograph separation, curing diseases etc.
Which of the following is not a surface phenomenon?

Match List I with List II

LIST I	LIST II
A. Zone refining	I. Dressing of ZnS
B. Froth floatation process	II. Extraction of Au
C. Cyanide process	III. of AIExtraction
D. Electrolytic reduction	IV. Ultrapure Ge

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Which of the following combinations should be used for better tuning of an LCR circuit used for communication?

When a ray of light is incident on the face AB of prism normally, after refraction it is found to graze the side AC as shown in the figure, the refractive index of the prism is

A capacitor charged from a 100 V d.c supply is found to have charge of 20 \(\mu\text{C}\). How much energy is stored in it ?

To demonstrate the phenomenon of interference, required two sources of light must have

The shortest distance between the lines \(\vec{r}=(\hat{i}+2 \hat{j}+3 \hat{k})+\lambda(2 \hat{i}+3 \hat{j}+4 \hat{k})\) and \(\vec{r}=(2 \hat{i}+4 \hat{j}+5 \hat{k})+\mu(4 \hat{i}+6 \hat{j}+8 \hat{k})\) is equal to

Sodium chloride solution also called normal saline solution which is safe to inject intravenously has a concentration of :