MP Police SI (Technical) Mock Test - 9 - MP Police SI MCQ

Hydrolysis is one of the primary chemical reactions at the time of enzymatic digestion.

In this process, the enzyme adds elements of water to the substrate in order to break down its bonds.

Hydrolysis is the enzymatic digestion which is considered to the process of the conversion of the substrate into the products with the support of the help of enzymes.

Thus, the primary chemical reaction during enzymatic digestion is Hydrolysis.

As we know,

Coefficient of viscosity,

Then,

Force

Area

Velocity gradient

Hence, the correct option is (D).

Given:

Cost of per articles = Rs. 5

Profit

Profit percent

CP = cost price

selling price

CP of 600 articles Rs.

Rs. 3000

SP of 500 articles Rs.

Rs. 3900

SP per articles Rs.

Rs.

SP of 540 articles Rs.

Rs. 4212

Profit Rs. Rs. 1212

Profit percent

Profit percent is

Myopia is known as nearsigntedness.

Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina. A Concave lens (diverging lens) is used by people suffering from myopia.

Boron and aluminium belong to p block elements and are group 13 elements whereas magnesium and potassium belong to s block elements. Potassium belongs to group 1 and magnesium belongs to group 2.The metallic character of elements decreases from left to right across a period. Thus, the metallic character of Mg is more than that of Al. The metallic character of elements increases down a group. Thus, the metallic character of Al is more than that of B.Thus, the correct sequence of decreasing metallic character is K > Mg > Al > B.

Convection is the mode of heat transfer which occurs mostly in liquids and gases. In this method, heat transfer takes place through the actual motion of matter from one place within the body to the other.

The air near a heat source gets hot and rises. And the air from the sides comes in to take its place. This process is convection.

The hot air is having a lower density. When heated it rises. After rising, the area remains vacant. The vacant space is filled by a convection current of air from the cooler area.

Given,

The percentage error in the measurement of mass,

The percentage error in the measurement of speed,

The kinetic energy of the particle is given by

The percentage error in kinetic energy will be,

Given:

According to ohm's law,

......(1)

By equation (1) for

......(2)

By equation (1) for

Linear Momentum = [Mass] × [Velocity].....(1)

The dimensional formula of Linear Momentum,

Mass ....(2)

Velocity ......(3)

On substituting equation (2) and (3) in equation (1) we get,

Linear Momentum = [Mass] × [Velocity]

Therefore, linear momentum is dimensionally represented as .

Hydrogenation is a process that uses hydrogen gas to change a liquid vegetable oil into a hard spread/margarine.

This process stabilizes the oil and prevents spoilage from oxidation.

Nickel is the preferred catalyst for the hydrogenation of fats and oils to speed up the reaction.

The hydrogenation process increases the melting point of the fat, which changes liquid oil into solid shortening.

Given:

Wavelength of A, λA = 5 × 10^-8 m

Momentum of B = 2 × Momentum of A

According to de-Broglie's equation :

 λ =  ..........(i)

where, λ = Wavelength

h = Planck's constant

p = Momentum

Thus, for particle A:

.........(ii)

For particle B:
.........(iii)
As, we we have from equation
........(iv)
Dividing equation (ii) by equation (iv), we get

The circuit where the current is not flowing, its resistance is infinite. It is called an open circuit. The circuit of the generator is an open circuit, thus the circuit of a switchless and load-less socket is an open circuit. The potential exists but due to the circuit opening, the current flow value is zero.

By the given circuit, the potential difference across A and B is 20 V because cell is in open circuit.

Given:

x² + x + 1 = 0 ....(i)

We have x² + x + 1 = 0

We have to find the value of x¹⁹⁹ + x²⁰⁰ + x²⁰¹

⇒ x¹⁹⁹  (1 + x + x²) 

From (i), we get

⇒ x¹⁹⁹ × 0

⇒ 0

and invested in a business. The profit earned was divided in the ratio .

Amount invested to ratio of their profit

The amount of invested Rs. 40000 and amount invested by is .

Amount invested to ratio of their profit

The amount invested by is Rs.

The figure that is not a direct manifestation of the quantum nature of atoms is (C).

Photoelectric effect option (B), atomic spectrum option (C) and Black body radiations option (D) may be explained by quantum theory. As on increasing temperature, all the values of internal energy becomes possible, it is not directly explained from quantum theory.

is produced during calcination. It involves heating when the volatile matter escapes leaving behind the metal oxide.

We can use this formula to solve this question

We have to find

is the required answer.

In general from left to right in a period, ionistion enthalpy increases due to effective nuclear charge increases.

But due to extra stability of half filled and full filled electronic configuration, required ionisation enthalpy is more from neighbouring elements. i.e., first ionisation enthalpy order is:

Al < Mg < Si < S < P

Whenever an alkyl halide reacts with alcoholic potash (or alcoholic sodium hydroxide), beta-elimination of the halide occurs, leading to the formation of an alkene.

In the case of electrolytic refining of nickel, crude nickel is taken as Anode.

Electrolytic refining is the process of refining of metal in which impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of the metal salt is used as an electrolyte. Eg: used as electrolyte.

According to the problem, fundamental quantities are momentum , area and time and we have to express energy in these fundamental quantities.

Let energy ,

.....(i)

Where, is dimensionless constant of proportionality.

Dimensional formula of energy,

Putting all the dimensions in equation (i), we get

According to the principle of homogeneity of dimensions, we get

....(ii)

...(iii)

...(iv)

By solving these equations, we get

Dimensional formula for

Given,

Discount

Profit

The cost price of the article ₹

As we know,

Selling Price Marked price

Let the marked price be .

He still earns a profit ,

Now,

Selling Price

Now,

Now,

The sum of marked price and selling price of the article ₹

The required sum is ₹ .

 does not represent electric power in a circuit.

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

In simple harmonic motion,

Velocity

Acceleration

From this, we can easily see that when is maximum, is zero.

The galvanometer is converted into an ammeter, by connecting a shunt, in parallel with it.

By Ohm's law,

Here

So,

Copper oxide combines with carbon dioxide to make copper carbonate, which gives it a green colour. This process is called corrosion of copper.

Ethyl acetate, Acetamide and Acetonitrile will react with hrdroxyl ions by nucleophilic attack but Diethyl ether will not react with hrdroxyl ions by nucleophilic attack.

Simple harmonic motion occurs when the restoring force is directly proportional to the displacement from equilibrium.

F α -x

Where F = force and x = the displacement from equilibrium.

The negative sign tells that direction of force is opposite to displacement from the equilibrium position i.e. towards the equilibrium position.

It is a to and fro motion about its equilibrium position.

Electron gain enthalpy generally becomes more negative across a period as we move from left to right. Within a group, electron gain enthalpy becomes less negative down a group. However, adding an electron to the 2p-orbital leads to greater repulsion than adding an electron to the larger 3p-orbital. Thus the element with the most negative electron gain enthalpy is chlorine; the one with the least negative electron gain enthalpy is phosphorus.

Steel - Iron with about carbon and may contain some other elements like manganese.

Bronze - It consists of copper, tin, and with the addition of some other metals like aluminum, manganese, zinc or nickel in small proportions.

Brass - Copper and zinc with some other elements like arsenic, lead, phosphorus, aluminum, manganese, and silicon.