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#9237 Medium General Science GENERAL SCIENCE

In periodic table elements are arranged according to ____?

In periodic table elements are arranged according to ____?

A

Increasing atomic mass

B

Decreasing atomic number

C

Both A and B

D

Increasing in atomic number

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The correct answer is A.

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Explanation The modern periodic table is arranged by increasing atomic number (number of protons). This arrangement resolves inconsistencies in earlier tables and groups elements with similar properties together.

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#9238 Medium General Science GENERAL SCIENCE

The unit of frequency is _____?

The unit of frequency is _____?

A

Hertz

B

Metre

C

Meter Per Second

D

None of these

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The correct answer is A.

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Explanation The hertz is the unit of frequency  of one cycle per second.   symbol: hertz (Hz) Hertz in honor of the German physicist Heinrich Hertz hertz in the International System of Units (SI) frequency i s defined as one cycle per second ***

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#9239 Medium General Science GENERAL SCIENCE

The unit of amount of substance in SI system is _____?

The unit of amount of substance in SI system is _____?

A

Liter (L)

B

Mole (mol)

C

Gram (g)

D

Kilogram (Kg)

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The correct answer is A.

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Explanation The Mole (mol) is the SI unit of amount of substance, representing 6.022 x 10^23 particles. It is used to measure the amount of a substance in a sample.

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#9240 Medium General Science GENERAL SCIENCE

Mass of Earth is _____?

Mass of Earth is _____?

A

6.0 x 10^23 kg

B

6.0 x 10^24 kg

C

6.0 ´ 10^25 kg

D

6.0 ´ 10^26 kg

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The correct answer is A.

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Explanation The mass of Earth is approximately 6.0 x 10^24 kilograms ( 5.98 x 10^24 kg ). This is a widely accepted scientific value , based on various measurements and calculations, including: Gravity measurements Satellite orbits Seismological data Planetary formation models

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#9241 Medium General Science GENERAL SCIENCE

Ozone layer protect us from the harmful _______ of the Sun.

Ozone layer protect us from the harmful _______ of the Sun.

A

Heat

B

Cold

C

Ultraviolet rays

D

None of these

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The correct answer is A.

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Explanation The s tratospheric ozone layer  is Earth's “ sunscreen ”  protecting living things from too much  ultraviolet  radiation from the sun. Oxygen layer in the  atmosphere Ozone   protects  us from the harmful ultraviolet radiation of the sun. Ozone  formula : O3 The ozone layer lies approximately  15-40 kilometers  (10-25 miles) above the Earth's surface, in the stratosphere. The ozone layer is  depleting : Air pollution

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#9210 Medium FPSC 5 Years Past Papers Subject Wise (Solved With Details) FPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)

A triangle has ____ vertices?

A triangle has ____ vertices?

A

1

B

2

C

3

D

none

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The correct answer is C.

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Explanation A triangle has three edges Its three sides. It also has three vertices , which are each corner where two edges meet.

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#9211 Medium FPSC 5 Years Past Papers Subject Wise (Solved With Details) FPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)

How many end points are in a line

How many end points are in a line

A

no end point

B

one endpoint

C

two endpoint

D

none

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The correct answer is A.

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Explanation A line has no end points, a ray has one endpoint and a line segment has two endpoints.

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#9212 Medium FPSC 5 Years Past Papers Subject Wise (Solved With Details) FPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)

The element of an electric stove made

The element of an electric stove made

A

nicrome

B

magnalium

C

copper

D

invar

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The correct answer is A.

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Explanation The element of an electric stove made nicrome. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.

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#9213 Medium FPSC 5 Years Past Papers Subject Wise (Solved With Details) FPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)

How many sides a pentagon have?

How many sides a pentagon have?

A

5

B

7

C

8

D

None

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The correct answer is A.

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Explanation The word pentagon is derived from a Greek word, pente, meaning five sides or a five-sided polygon.

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#9214 Medium FPSC 5 Years Past Papers Subject Wise (Solved With Details) FPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)

The energy value of food is measured in :

The energy value of food is measured in :

A

Proteins

B

Joule

C

Vitamins

D

Calories

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The correct answer is A.

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Explanation Energy is measured in units of kilocalories One kilocalorie  is equal to 4.18 kilojoules. The amount of energy a food contains per gram is known as its energy density, So we can describe fat as more energy-dense than protein or carbohydrate.