Which of the following statement is incorrect about aldol condensation?

What types of bond (linkage) are present in nucleotide?

Which of the following material is a semiconductor?

Which of the following is known as Hinsberg's reagent?

Arrange the following electrolytes in the increasing order of van't Hoff factor (i) for complete dissociation of solute.
(A) \([Co(NH_3)_6]Cl_3\)
(B) \(MgCl_2\)
(C) \(K_4[Fe(CN)_6]\)
(D) KCl
Choose the correct answer from the options given below:

Read the passage carefully and answer the questions
Optically active polyhydroxy aldehydes or ketones or molecules which provide such units on hydrolysis are called carbohydrates. They can be broadly classified as monosaccharides, disaccharides and polysaccharides depending on their behavior towards hydrolysis. They are also classified as reducing or non-reducing sugars. Another class of biomolecules is proteins which are polymers of twenty different amino acids linked by peptide bonds. Amino acids can be classified as acidic, basic or neutral depending on the relative number of amino and carboxyl groups in their molecule. The essential amino acids cannot be synthesized by our body and hence must be provided through diet. Nucleic acids are the polymers of nucleotides which in turn consist of a base, pentose sugar and phosphate. There are two types of nucleic acids namely, DNA and RNA which differ in the composition of sugar and a base.
Four bases present in RNA molecule are:

Match List - I and List - II

LIST – I (Name of vitamins)	LIST – II (Deficiency Disesse)
(A) Vitamin - A	(I) Increase in fragility of RBC
(B) Vitamin - E	(II) Increased blood clotting time
(C) Vitamin - C	(III) Xerophthalmia
(D) Vitamin - K	(IV) Scurvy

Choose the correct answer from the options given below:

Two point charges placed a distance d apart in vacuum exert a force of magnitude F on each other. One of the two charges is doubled. To keep the magnitude of force same the separation between the charges should be changed to

The fluid filled cavity present in the secondary follicle is known as:

Two metals, X and Y have work functions, 4 eV and 10 eV, respectively. The ratio of threshold wavelengths of metal X to metal Y is

If \(A\) and \(B\) are any two events such that \(P(B)=P(A\) and \(B)\), then which of the following is correct:

Let us suppose that two independent random samples of sizes \(n_1\) and \(n_2\) have been drawn from the same normal population.
Then the degree of freedom of the statistic \(t\)-distribution is

Which of the following is a fat soluble vitamin?