The gold number range of some of the lyophilic colloids is given below:
A: 0.005-0.01, B: 0.15-0.25, C: 0.04-1.0, D: 15-25
Which among these can be used as a better protective colloid?

Which of the following will produce turbidity most readily when treated with conc. HCl in presence of anhydrous \(ZnCl _2\) (Lucas reagent)?

A solution of CuSO _4 is electrolysed for 10 minutes using a current of amperes. ( 1 mol of \(Cu =63 g\) ). How much copper is deposited at cathode
\(1 F=96487 C mol^{-1}\)

What is the value of van't Hoff factor for complete dissociation of K2SO4 ?

Match List-I (vitamin) with List-II (deficiency disease)

List-l (Vitamin)	List-II (Deficiency disease)
(A) Thiamine	(I) Convulsions
(B) Pyridoxine	(II) Cheilosis
(C) Vitamin E	(III) Retarded Growth
(D) Riboflavin	(IV) Muscular weakness

Choose the correct answer from the options given below :

Choose the correct statements for ortho and para nitrophenol
(A) They can be separated by steam distillation
(B) o-Nitrophenol undergoes intramolecular hydrogen bonding
(C) P-Nitrophenol undergoes inter molecular hydrogen bonding
(D) p-Nitrophenol is less volatile
Choose the correct answer from the options given below:

Read the passage carefully and answer the questions
The carbonyl group of aldehydes and ketones is highly polar. The positively charged carbon is readily attacked by electron-rich nucleophile and the negatively charged oxygen atom is attacked by an electro-deficient electrophile. Aldehydes and ketones undergo nucleophilic addition reactions in the presence of acid or a base. The mechanism involves attack of a nucleophile on the electron deficient carbonyl carbon to form a tetrahedral intermediate. A new bond is formed between the carbon and oxygen. Protonation of the anion furnished by the reaction medium yields neutral addition product. The addition product is same whether the reaction is catalyzed by acid or a base. For example in the presence of base aldehydes and ketones react with hydrogen cyanide to form cyanohydrin.
Which of the following compounds will undergo nucleophilic addition readily?

The geometry and magnetic property of the complex \([Ni(CO)_4]\) is :

Which of the following pairs of solutions are isotonic?

A sparrow is a primary consumer when it eat seeds, but becomes secondary consumer when it eats ____________

In the given circuit, \( D_1 \) and \( D_2 \) are normal diodes. The current drawn from the battery by the diode network is

Match List - I with List - II

List - I (Vitamin)	List - II (Deficiency)
(A) Vitamin D	(I) Slow blood clotting
(B) Vitamin C	(II) Night blindness
(C) Vitamin K	(III) Rickets
(D) Vitamin A	(IV) Scurvy

Choose the correct answer from the options given below :

Let \(R\) be the relation in the set \(\{1,2,3\}\) given by \(R=\{(1,1),(2,2),(3,3),(1,2),(2,3)\}\). Choose the correct answer.