KVPY (SA) Mock ...

'A' can construct a wall in 30 days, whereas 'B' can construct or destroy the same wall in the same time i.e destroy time is equal to construct time. If 'A' constructs and 'B' destroys, it takes 60 days to construct the wall. How many days will it take to construct the wall, if both 'A' and 'B' work towards constructing the wall?

Rohan sleeps at 10 pm and wakes up at 7 am. He bathes from 7 am to 8 am. He plays from 8 am to 10 am and again from 5 pm to 8 pm. He takes his dinner from 8 pm to 9 pm and watches TV from 9 pm to 10 pm and he studies the rest of the time. Which of the following represents his study time in fractions?

We are able to squeeze snow and make balls out of it because of

An electric heater consists of a nichrome coil and runs under 220 V, consuming 1 kW power. Part of its coil burns out and it is reconnected after cutting off the burnt portion. The power it will consume now is

When a fuse is rated 8 A, it means it

A symmetric double convex lens is cut into two equal parts by a plane perpendicular to the principal axis. If the power of original lens is 4D, the power of a cut lens will be

A convex lens is used to form an image of an object on a screen. If the upper half of the lens is blackened so that it becomes opaque, then

The molecular formula of marsh gas is ________.

The correct order of increasing basic nature for bases NH₃, CH₃NH₂, (CH₃)₂ NH is

The type of hybridisation in CH₂ = CH₂ is

From the ground state of electronic configuration of various electrons, which will have the highest second ionisation energy?

Two isotonic nuclides X and Y have mass numbers 35 and 37 respectively. If the atomic number of X is 17, the atomic number of Y will be _______.

Which of the following is a polar compound?

The helical structure of proteins is stabilized by

A solution is highly acidic in nature and a small quantity of a weakly basic solution is added to it. What will be the chemical nature of the resulting solution?

In which of the following compounds does nitrogen have an oxidation state of − 1?

Non-metals are poor conductors of electricity because of the absence of

Which of the following compounds is not a hydrocarbon?

Which of the following word equations is incorrect?

Vitamin excreted by urine in higher vertebrates is

Which of the following is related to the central nervous system?

Identify the group among the following, which contains all the viral diseases.

If tall height (TT) is a dominant trait and short height is a recessive trait (tt) in the garden pea, then which of the following statements is true?

Fucus, an alga has which of the following types of life cycle?

Bidder's canal is found in

Klinefelter's syndrome in humans is an archetype of chromosomal aneuploidy. It is diagnosed by

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

Which of the following cell types is considered as cell fragment and not a complete cell?

In meiosis, germ cells will undergo two successive divisions in which

The enzymes which differ slightly in structure, but can catalyze the same type of reaction, are known as

Where do endocrine glands release their secretions?

Which of the following is the feature of skeletal muscle fibres?

Sacculated, fusiform or cylindrical forms are the main forms of which of the following diseases?

How many stereoisomers is shown by a glucose molecule having 4-asymmetric carbonation?

Portuguese man o' war or physalia is a

In a cross between red-eyed female dragonfly and a white-eyed male dragonfly what percent of the male progenies will have white eyes? (White eyes are X-linked recessive)

Mechanical support, enzyme circulation and protein synthesis are the main functions of

According to widely accepted "fluid mosaic model" cell membranes are semi–fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

Organisation of stem apex into corpus and tunica is determined mainly by