KVPY Class-XI (...

The number of real roots of the polynomial equation x⁴ - x² + 2x - 1 = 0 is

Suppose the sum of the first m terms of an arithmetic progression is n and the sum of its first n terms is m, where m ≠ n. Then, the sum of the first (m + n) terms of the arithmetic progression is

A box filled with water has a small hole on its side near the bottom. It is dropped from the top of a tower. As it falls, a camera attached on the side of the box records the shape of the water stream coming out of the hole. The resulting video will show

One can define an alpha-Volt (αV) to be the energy acquired by a particle when it is accelerated by a potential of 1 Volt. For this problem you may take a proton to be 2000 times heavier than an electron. Then,

Which of the following is NOT true about the total lunar eclipse?

Among the following, the correct statement is:

Among the following, the INCORRECT statement is:

The correct order of energy of 2s orbitals in H, Li, Na and K, is

A filter paper soaked in salt X turns brown when exposed to HNO₃ vapour. Salt X is

The role of haemoglobin is to

Which of the following molecules is a secondary metabolite?

Lecithin is a

The water potential (ψ_w) of pure water, at standard temperature and atmospheric pressure, is

In neurons, action potential is generated by a rapid influx of

Erythropoietin is produced by

Tendrils are modifications of

Which of the following combinations of biomolecules is present in ribosomes?

Which of the following proteins does not play a role in skeletal muscle contraction?

Which of the following statements is true about trypsinogen?

Which of the following organisms respires through the skin?

Which of the following human cells lacks a nucleus?

The first enzyme that the food encounters in the human digestive system is

Glycoproteins are formed in which of the following organelles?

An example of nastic movement:

Among the following, the species with identical bond order are

The lowest stability of ehthyl anion compared to methyl anion and the higher stability of ethyl radical compared to methyl radical, respectively, are due to

A cross was carried out between two individuals heterozygous for two pairs genes. Assuming segregation and independent assortment, the number of different genotypes and phenotypes respectively obtained would be

If the H⁺ concentration of aqueous solutions is 0.001 M, then the pOH of the solution would be

Consider the following vision defects listed in Column-I & II and the corrective measures in Column III.

Choose the correct combination.

Which of the following properties causes the plant tendrils to coil around a bamboo stick?