The half life of a first order reaction having rate constant, \(k=1.7 \times 10^{-5} s^{-1}\) is

White phosphorous shows chemiluminescence because it:

Choose the correct statement(s) for Wolff Kishner Reaction.
(A) The carbonyl group of aldehyde and ketone is reduced to CH\(_2\) group.
(B) Wolff Kishner Reaction involves potassium hydroxide and ethylene glycol
(C) The reaction is carried out at a low temperature.
(D) Hydrazine is used in this reaction.
Choose the correct answer from the options given below:

Toluene on chlorination in presence of UV light gives

In a Daniell cell
A. Current flows from zinc electrode to copper electrode
B. Electrons flow from zinc electrode to copper electrode.
C. Cell potential depends on size of electrodes used.
D. Electrons flow from copper electrode to zinc electrode
E. Copper ions move towards cathode and zinc ions move away from anode.
Choose the correct answer from the options given below:

Read the passage carefully and answer the questions
The chemical reactions proceed at different rates which depend on various factors like concentration, temperature, etc. Rate law is an expression which relates the rate of reaction with concentration of various reacting species in the reaction. For a first order reaction, the concentration of the reactant after time \(t\) is related with its initial concentration by the relation, \(C=C_0 e^{-k t}\). The rate constants for different orders have different expressions. For a first order reaction, \(k=\frac{2.303}{t} \log \frac{a}{a-x}\), where \(a\) is the initial concentration and \(x\) is the extent of reaction.
A reaction which is first order with respect to the reactant \(A\) has a rate constant of \(6 min^{-1}\). If the reaction is started with \([A]=5.0 mol L ^{-1}\) when would \([A]\) reach the value of \(0.05 mol L ^{-1}\)

Which one of the following statements regarding electrolytic solution is not correct?

If \(x=a \cos ^3 \theta, y=a \sin ^3 \theta\). The value of \(\frac{d^2 y}{d x^2}\) at \(\theta=\frac{\pi}{6}\) is :

Arrange the following transition metal ions in the increasing order of unpaired electrons.
(A) \(Cu ^{2+}\)
(B) \(Cr ^{2+}\)
(C) \(Ni ^{2+}\)
(D) \(Sc ^{3+}\)
Choose the correct answer from the options given below:

'GEAC' stands for -

Identify the correct statements among the following.
(A) For two unlike equal charges, there is a neutral point on the middle point on the line joining the two charges.
(B) For two, unlike unequal charges, the neutral point will be outside on the line joining the two charges.
(C) For two positive equal charges, the neutral point will be at the middle point of the line joining the two charges.
(D) For two negative charges placed along a line, there will not be any neutral point.
Choose the correct answer from the options given below:

A' \(+ H _2 O / H\) _________ ' \(B\) ' \(+ N a O H + C a O\) _________ Benzene
The compound ' A ' is:

Which one of the following is not fermented by microbes to make foods?