Amalgam of mercury with sodium belongs to which solute-solvent combination

Certain Aldehydes, Retore and certain alcohol undergo iodoform test. Certain Aldehydes ketones undergo aldol condensation. While certain aldehydes undergo Cannizaro's reaction. Aldehydes responds to tollen reagent and fehling reagent test.
Which amongst the following will respond to both Tollens' reagent test and Fehling's reagent test?

For the cell \(Ni(s)\ |\ Ni^{2+}\ (0.1M)\ ||\ Cu^{2+}\ (0.1M)\ |\ Cu(s)\), the cell potential will increase when :

Which of the following can be prepared from Sandmeyer's reaction?
(A) Chlorobenzene
(B) Bromobenzene
(C) lodobenzene
(D) Fluorobenzene
Choose the correct answer from the options given below:

What is the correct IUPAC name of\([Pt(NH_{3})_{2}Cl_{2}]\)

Match List-I with List-II

List-I (Reaction property)	List-II (Formula)
(A) Half-life of decomposition of gaseous ammonia on hot platinum surface	(I) \(\frac{1}{t} \ln \left(\frac{[A]_0}{[A]_t}\right)\)
(B) Instantaneous rate	(II) \(\frac{[R]_0}{2 k}\)
(C) Rate constant of inversion of cane sugar	(III) \(-\frac{d x}{d t}\)
(D) Half-life of acid hydrolysis of methyl acetate	(IV) \(\frac{\ln (2)}{k}\)

Choose the correct answer from the options given below:

Read the passage carefully and answer the Questions
The term vitamin was coined from the word vital +amine since the earlier identified compounds had amino groups. Later work showed that most of them didn't contain amino groups, so the letter "e" was dropped and ther term vitamin is used these days.
Vitamins are classified into two groups depending upon their solubility in water or fat. Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues. Water-soluble vitamins are soluble in water. They must be supplied regularly in the diet as they are readily excreated in urine.
What are the sources of Vitamin B12?

A resistor R and an inductor L are connected in series to a 24 V, 50 Hz supply. A current of 1 A flows through the circuit. If the current differs in phase from the applied voltage by 60°, the value of impedance in the circuit is

If A is a matrix of order mn and B is a matrix such that AB' and B'A are both defined, the order of matrix B is :

Which of the following statements about gold (Au) element are correct ?
(A) quad Gold occurs in nature in native state.
(B) quad Gold discolves in aqua-regia.
(C) quad Gold is extracted by leaching the metal with dilute NaCN .
(D) \quad Leaching is followed by replacement reaction.
Choose the correct answer from the options given below :

A square matrix \(B=\left[b_{i j}\right]_{n \times n}\) where
\(b_{i j}=0\) when \(i \neq j\)
\(b_{i j}=k\) when \(i=j\) for some constant \(k\) is called:

If \(A\) and \(B\) are non singular square matrices of the same order,
then which of the statements are true ?
(A) \((\operatorname{adj} A)(\operatorname{adj} B)=(\operatorname{adj} B)(\operatorname{adj} A)\)
(B) \((A B)^T=A^T B^T\), if \(A^T\) denotes transpose of \(A\)
(C) \((A B)^{-1}=B^{-1} A^{-1}\)
(D) Multiplication of matrices is not commutative

The area of the region bounded by \(y^2=2 x+1\) and x - y = 1 is: