MP Police SI (Technical) Mock Test - 7 - MP Police SI MCQ

have tetrahedral shape while have square planner structure.
The magnetic moment of reveals that the species is paramagnetic having two unpaired electrons i.e., is . The four electron pairs by ligand leads to - hybridization in and do not disturb configuration to give tetrahedral geometry.

Let be assume the number is x.

⇒ × x + 75 = x

⇒ x = = 300

∴ The required result will be 300.

Nitrogen is a non-metal. Elemental nitrogen is a colourless, odourless, tasteless and mostly inert diatomic gas at standard conditions. Nitrogen constitutes 78% by volume of Earth's atmosphere.

Given equation is .

For any quadratic equation of form

So,

Also, and

If , then the minimum value of equation

Minimum value of equation

If two bodies at different temperatures and are brought in thermal contact, heat is said to flow from the body at higher temperature to the body at lower temperature until an equilibrium is obtained, i.e., until a point at which the temperatures of both the bodies becomes the same. The equilibrium temperature turns out to be the same as the mean temperature, which can be denoted as only when thermal capacities of the two bodies are the same.

in has eight corner and six face atoms and thus, if we remove face centred atom of one axis, then two face atoms are removed.

Thus, is at corners at face centers.

Number of atoms per unit cell

present in all octahedral voids, thus number of atoms per unit cell

Thus, formula is .

According to Newton's law of gravitation, the gravitational force between two masses and is proportional to the product of their masses and the distance between them is the square of . Is inversely proportional to force.

In this way gravity does not depend on the medium

So,

Component of acceleration along the inclined plane will be

has largest number of isomers which includes geometrical isomers (cis and trans isomers) as well as stereoisomers form, form and optically inactive form. en is a bidentate ligand.

Minerals are naturally occurring chemical substances in the earth’s crust obtainable by mining.

Out of many minerals in which a metal may be found, only a few are viable to be used as sources of that metal. Such minerals are known as ores.

Wilhelm Conrad Roentgen discovered X-Rays in 1895. He discovered this while working with a cathode-ray tube in his laboratory.

X-Ray is an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light. The frequency of X-Rays is 1016 to 1019 Hz. X-rays are used to detect cracks in bones, in medicine and industries and also for security purposes.

Given:

Heat absorbed by the engine is .

The efficiency of the heat engine is given by:

The compound can show geometrical isomerism when both the valencies of double-bonded carbon are satisfied by different groups. In 2,3-Dimethylpent-2-ene both valencies of second carbon are satisfied by the methyl group. Hence it will not show geometrical isomerism.

Sphalerite ore : ZnS

Calamine ore : ZnCO₃

Siderite ore : FeCO₃

Malachite ore : Cu(OH)₂.CuCO₃

It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using' depressants'. In case of an ore containing ZnS and PbS, the depressant used is NaCN.

Here, comparing with

We get,

Product of roots

Given:

Principal = Rs. 300

Time = 2 years

Rate of interest = 5%

Formula:

Amount = 

Amount = 

= Rs. 330.75

∴ The amount received is Rs. 330.75.

Methane is the simplest member of the alkane family and indeed the simplest of organic compounds, as all other compounds are derived by altering this compound.

I.

II.

So, 

Given that, the temperature of freezer,

Coefficient of performance,

The coefficient of performance is defined as,

Let the sum of money be Rs. .
Simple Interest at per annum for years of Rs.
So, according to the question,

Therefore, Sum Rs. Rs. Rs.

Relative speed, if opposite directions = (x + y) km/hr

Relative speed of both men, if they running opposite direction.

km/hr

m/s

Time taken to meet each other seconds

An instrument called lactometer is used to measure the density of milk. Lactometer works on the principle of gravity of milk.

We have the algebric expression

The square root of is .

A gas filled balloon moves up because upward force on the balloon is more than gravitational force.

• A simple device that uses hot air or a lighter gas to rise into the air.
• Archimedes Principle: The buoyant force acting on an object floating in a liquid is equal to the weight of the liquid displaced by the object.
• The balloon is based on Archimedes' principle.
• When the air gets heated, the density of that air becomes less as compared to the density of the surrounding air or we can use a gas whose density is less than that of the air.
• The difference in density causes the balloon to rise above the ground.
• Therefore, the balloon will go up only when we fill it with a gas with a lower density than atmospheric air.

Metals are extracted from ore and minerals contain both metals as well as non-metals. For example, aluminium exists in two mineral forms that are clay and Bauxite. But aluminium is mainly extracted from bauxite which contains 70% aluminium oxide, i.e., Bauxite is an ore of aluminium whereas clay is not an ore. So, every ore is a mineral but every mineral is not an ore.

Increase in concentration of litre

mol litre

(b) Rate of reaction

(c) Rate of disappearance of

litre

Given that,

x² - (p - 2)x - p + 1 = 0 ---(i)

Let the roots of equation are α and β.

Sum of root α + β = (p - 2)

Product of root = αβ = -p + 1

∵ a² + b² = (a + b)² - 2ab

⇒ α² + β² = (p - 2)² - 2(-p + 1)

⇒ α² + β² = p² - 4p + 4 + 2p - 2

⇒ α² + β² = (p - 1)² + 1 ---(ii)

(p - 1)² + 1 will be minimum when,

p = 1

Two bodies in contact are said to be in thermal equilibrium when no heat flow occurs between the two bodies.

Thermal equilibrium: Thermal equilibrium is a condition when two surfaces in physical contact have no exchange of heat between them.

• Heat flows from an object of higher temperature to an object of lower temperature.
• So, temperature governs the direction of heat flow.
• When no heat flow occurs, it is to be inferred that the surfaces are at the same temperature.