The flocculating power of \(\left[ Fe ( CN )_6\right]^{4-}\) is higher than \(PO _4^{3-}\) ion because :

Which of the following statements are correct?
A. \(\text{CuI}_2\) is not known.
B. \(\text{Cu}_2\text{I}_2\) is known.
C. \(\text{Cu}^{2+}\) ion oxidises \(\text{I}^-\text{}\) to \(\text{I}_2\).
D. \(\text{Cu}^{2+}\) ion does not oxidise \(\text{I}^-\text{}\) to \(\text{I}_2\).

0.1 M NaCl solution has lower freezing point than \(0.1 M MgCl _2\) solution in water because:

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is:

Graphite is a good conductor of electricity due to the presence of -

In case of phosphorus, \(\text{PCl}_3\) and \(\text{PCl}_5\) are possible while nitrogen only forms \(\text{NCl}_3\), and not \(\text{NCl}_5\). This due to :

A reaction is 2nd order w.r.t A and 1st order w.r.t B. When the concentrations of both A and B are doubled the rate of reaction will become:

A capacitor of capacitance C is first charged by a battery of V volts. It is disconnected from the battery and is filled with a dielectric of dielectric constant K. The ratio of energy stored in the two cases, respectively will be

Formic acid does not respond to

Match List-I with List-II

List-I	List-II
(A) Freons	(I) Paint remover
(B) DDT	(II) Refrigeration
(C) Dichloromethane	(III) Fire extinguisher
(D) Tetrachloromethane	(IV) Insecticide

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?

Read the following passage carefully and answer the given questions.
Theory of Evolution
The evolution of life is a gradual process through which simple organisms are transformed into complex life forms over billions of years. It involves genetic changes, adaptation to the environment, and the emergence of diversity in species. Fossil records provide evidence of extinct life forms and transitional stages. Evolution is influenced by factors such as mutation, genetic recombination, and environmental pressure, shaping the biodiversity we see today. Charles Darwin and Alfred Russel Wallace were pioneering naturalists who developed the theory of evolution by natural selection.
According to Darwin, the term 'Fitness' in the context of natural selection refers to:

The angle between the pair of straight lines given by \(\vec{r}=(3 \hat{i}+2 \hat{j}-4 \hat{k})+\lambda(\hat{i}+2 \hat{j}+2 \hat{k})\) and \(\vec{r}=5 \hat{i}-2 \hat{j}+\mu(3 \hat{i}+2 \hat{j}+6 \hat{k})\) is :