VITEEE PCBE Mock Test - 1

Which is a component of chlorophyll ?

High blood pressure can be the result of

Agranal chloroplasts are found in some

Cell organelle covered by a single unit membrane is

Cell recognition and adhesion occur due to biochemicals of cell membranes named

If the decomposers become extinct, the most severely affected would be

Which is a set of evidence of evolution

The organs which look different but having same basic principle structure and origin are known as

Which are not homologous?

Somaclonal variation can be obtained by

Pneumococcus experiment proves that

Out of 64 codons, 61 code for 20 types of amino acids. It is due to

The plasmid

Epistasis results due to

A pregnant woman underwent amniocentesis. An extra barr body is present in the embryo. Syndrome likely to occur in child is

Patients with sex-linked disorder of Duchenne's muscular dystrophy die by the age of

An antibody is

which is introduced during small pox vaccination?

Blood group O has

Prop roots are modified into adventitious roots in

In a flowering plant, archesporium gives rise to

Roots can be used for vegetative propagastion of

Which one is required for photosynthetic evolution of oxygen ?

Which one of the following substances plays an important role in biochemical defence of host plants?

Agriculture was originated in mesolithic age about

Small, thin walled elongated cells associated with sieve tube elements are

Taj may be destroyed by

In coming years, skin related disorders will become more common due to

A person has impaired nervous system and signs of madness due to continued intake of metal contaminated water. The metal is

Amoeba ingests food by :

Which of the following store sperm cells and eliminate those that have major genetic defects?

Circulation of blood was discovered by and father of blood circulation is

Name the antibiotic used in the Lederberg's replica plating experiment

Hugo de Vries' contribution is

The scientist who proposed the first theory of evolution was

The inability to regulate the concentration of sodium ions in the blood could be due to improper functioning of the

Filtrate enters the Bowman’s capsule by

The potential difference V and the current I flowing through an instrument in an A.C. circuit of frequency f are given by V = 5 cos ωt volts and I = 2 sin ωt amperes (where ω = 2πf). The power dissipated in the instrument is

In photoelectric phenomenon, the number of photo electrons emitted depends on

The order of wavelength of X - ray is

An air capacitor of capacity C = 10μ F is connected to a constant voltage battery of 12 volt. Now the space between the plates is filled with a liquid of dielectric constant 5. The charge that flows now from battery to the capacitor is

The relation between Faraday constant F, electron charge e, and Avogardo Number N is

Consider telecommunication through optical fibres. Which of the following statements is not correct

A steady current is passing through a conductor of non-uniform cross-section. The net quantity of charge crossing any cross-section per second is

The internal resistance of a cell is the resistance of

For a cell, the terminal potential difference is 3.6 V, when the circuit is open. If the potential difference reduces to 3 V, when cell is connected to a resistance of 5 Ω, the internal resistance of cell is

When a resistance of 2 Ω is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is

In an electron gun the control grid is given to negative potential relative to cathode in order to

In a D.C. motor induced e.m.f will be maximum

In an ideal transformer, the voltage and the current in the primary are 200 V, 2A and that in the secondary are 2000 V, 1A. The value of is (in A).

The Lenz's law gives

Which of the following rays are not electromagnetic waves?

If the electric flux entering and leaving an enclosed surface respectively is φ₁ and φ₂, the electric charge inside the surface will be

An electron of charge e coulomb passes through a potential difference of V volt. Its energy in joule will be

A hollow metal sphere of radious 10 cm is charged such that the potential on its surface is 80V. The potential at the centre of the sphere is

A point charge Q is placed at a distance d from the centre of an uncharged conduction sphere of radius R. The potential of the sphere is d > R :

In C.G.S system the capacity of a spherical conductor is numerically equal to its

If 4x10²⁰  eV of energy is required to move a charge of 0.25 coluomb between two points, the p.d between them is

A charged particle moving in a magnetic field experiences a resultant force

If M_O is the mass of an oxygen isotope ₈O¹⁷ , M_p and M_n are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope is

The radio of the radii of the nuclei ₁₃Al²⁷ and ₅₂Te¹⁵²  is

In photoelectric effect, the work function of a metal is 3.5 eV. The emitted electrons can be stopped by applying a potential of -1.2 V. Then

A cesium photocell, with a steady potential difference of 60 V across it, is illuminated by a bright point source of light 50 cm away. When the same light is placed 1 metre away, the photoelectrons emitted from the cell

In a Huygen's eye piece with an eyepiece of focal length F, the distance between the eye-piece and field lens should be

Chromatic and spherical aberration are absent in

In an n-p-n transistor

In carbon cycle of fusion

Transistor can be used as

The impurity to be added to get n - type semiconductor is

The energy gap of silicon is 1.14 eV. The maximum wavelength at which silicon will begin absorbing energy is

The intrinsic semiconductor becomes an insulator at

Electrical conductivity of a semiconductor

P-type semiconductor is formed when
A. As impurity is mixed in Si
B. Al impurity is mixed in Si
C. B impurity is mixed in Ge
D. P impurity is mixed in Ge

If the ratio of intensities of two waves causing interference be 9:4, then the ratio of maximum and minimum intensities will be

In young's double slit experiment, the intensity of central maximum is I. It one slit is closed, the intensity at the same place will become

Both light and sound waves produce diffraction. It is more difficult to observe the diffraction with light waves because

A wave front travels

Which of the following enzymes converts glucose into ethyl alcohol?

A compound possessing α-hydrogen atom, in the presence of dilute alkali forms β-hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated crotonaldehyde. The compound is

Which of the following will give Cannizzaro reaction?

Which of the following does not give red ppt. with Fehling solution?

Which alkene gives the same product by the Markownikoff's and anti-Markownikoff's method

4.4 g of an unknown gas occupies 2.24 L of volume at standard temperature and pressure. The gas may be

The number of moles of sodium oxide in 620 g of it is

Which carbohydrates is an essential constituent of plant cells?

Glucose when treated with CH₃OH in the presence of dry HCl gives α and β-methylglucodsides because it contains

Which of the following is not present in RNA?

Acidic hydrolysis of acetamide gives

Which of the following compounds on boiling with KMnO₄ and the subsequent acidification will not give benzoic acid ?

The acid showing salt like character in aqueous solutions is

A cylinder filled with a movable piston contains liquid water in equilibrium with water vapour at 25^oC. Which one of the following operations results in a decreace in the equilibrium vapour pressure ?

Two moles of HI was heated in a sealed tube at 440^oC till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

Heat exchanged in a chemical reaction at constant temperature and pressure is called

In which of the following reactions, heat liberated is known as standard heat of formation of CO₂?

An alkane C₇H₁₆ is produced by the reaction of Lithium di (3-pentyl) cuperate with ethyl bromide. The structural formula of product is

In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true?

Bartituric acid and its derivatives are well known as

The IUPAC name of the following compound
CH₃-C(CH₃)₂-CH = C(CH₃)₂ is

Both geometrical and optical isomerisms are shown by

One mole of complex compound Co(NH₃)₅ Cl₃ gives 3 mol of ions on dissolution in water. One mol of same complex reacts with two mol of AgNO₃ solution to form two mol of AgCl(s). The struture of complex is

Hydrolysis of acetonitrile in acid medium gives

Compound A has a molecular formula C₇H₇NO on treatment with Br₂/KOH, A gives an amine B which respond to carbylamine test. B on diazotisation and coupling with phenol give an azo dye. A can be

When 9.65 Coulombs of electricity is passed through a solution of silver nitrate (atomic weight of Ag = 107.87 taking as 108.0) the amount of Silver deposited is

Which of the following is not a strong electrolyte?

In which cell of the free energy of a chemical reaction is directly converted into electricity ?

tert-Butyl methyl ether on heating with HI of one molar concentration gives

The removal of gangue from the ore is called

According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecules travels

Lead is maximum in

PCl₃ reacts with water to form

What is hybridization of P in Pcl₅ ?

Which of the following substance acts as an oxidising as well as a reducing agent ?

The crystal system of a compound with unit cell dimensions a=0.387, b=0.387 and c=0.0504 nm and α = β = 90⁰ and γ = 120⁰ is

In the following structure

Adsorption is a phenomenon, in which a substance

Transition elements are

The first transition element is

Find the antonym of ACCIDENTAL.

Fill in the blank with appropriate word.
.......... works of reference are so valuable as the Encyclopaedia Britannica.

Find the Syonym of ALERT

Choose the alternative which best expresses the meaning of the idiom/phrase.

To pour oil in troubled water

Improve the sentence by choosing best alternative for capitalised part of the sentence.

Most people feel that the most important reason to recycle is ITS EMPECT on future generations.