Archives

Give Geographical Reasons For The Following Statement: Settlements Are Sparse In Northeastern Brazil.

Settlements are sparse in North-eastern Brazil because settlement in an area depends upon many factors, including the climate, land patterns,... View Article

A Vertical U-Tube Of Uniform Cross-Section Contains Mercury On Both Sides Of Its Arms. Glycerin Column Of 10 Cm Is Introduced Into One Of Its Arms. Oil Of Density 0.8 G/Cc Is Poured Into The Other Arm Until The Upper Surface Of The Oil And Glycerin Are At The Same Horizontal Level. Find The Length Of The Oil Column.[Ρhg = 13.6 G/Cc, Ρglycerin = 1.3 G/Cc]

Sol: Given: ρHg = 13.6 g/cc ρglycerin = 1.3 g/cc Oil of density 0.8 g/cc Glycerin column of 10 cm = 0.8 * L + 13.6 (10 - L) = 1.3 *... View Article

The Lengths Of Steel And Copper Rods Are So That The Length Of The Steel Rod Is 5 Cm Longer Than That Of The Copper Rod At All Temperatures. What Will Be The Length Of Each Rod?

Sol: Let Ls and Lc be the lengths of the steel and copper rods. Let αs and αc be the coefficients of linear expansion. When the rods are... View Article

A Square Sheet Of Paper Has A Perimeter Of 40cm. Find Is The Length Of Its Side And The Area Of The Square Sheet?

Let ABCD is a square sheet with its sides = x cm. Four sides = 4 x As given: A square sheet of paper has a perimeter of 40cm. Therefore, 4 x =... View Article

Which Of The Following Has The Highest Specific Heat: (A) Water. (B) Copper. (C) Mercury. (D) Kerosene.

The correct answer is (A) Water. The specific heat of water is 4.186kjoule/gram°C. The specific heat of copper is 0.385kjoule/gram°C.... View Article

Is It Possible To Have An Accelerated Motion With A Constant Speed? Name Such Type Of Motion.

Yes. It is possible to have an accelerated motion with a constant speed. This type of motion is called a uniform circular motion. A uniform... View Article

Give Reasons: Cr2+ Is A Strong Reducing Agent Whereas Mn2+ Is Not [Cr=24 Mn=25]

The reducing agent is a compound which itself gets oxidized. Cr2+ better reducing agent, but Mn3+ is a better oxidizing agent because: Cr2+ is... View Article

Hemoglobin Contains 0.25% Iron By Mass. The Molecular Mass Of Hemoglobin Is 89600. Calculate The Number Of Iron Atoms Per Molecule Of Hemoglobin.[Atomic Mass Of Fe = 56]

Percentage of iron=0.25% If 100 gm of haemoglobin has 0.25gm of iron. then 89600 have: The atomic weight of Fe is 56 Number of moles... View Article

Polaj, Parauti, Chachar And Banjar Are The Types Of Lands Classified On The Basis Of The _________ Of That Land. (A) Colour. (B) Texture. (C) Structure. (D) Fertility.

The correct answer is (D) Fertility. Polaj, Parauti, Chachar and Banjar are the types of lands classified based on the fertility of that land.... View Article

The Rate Of A Chemical Reaction Doubles For Every 10°c Rise Of Temperature. If The Temperature Is Raised By 50°c,The Rate Of The Reaction Increases By About.

Sol: The rate of a chemical reaction doubles for every 10°C rise of temperature. If the temperature is raised by 50°C, the rate of the reaction... View Article

The Dotted Line Represents The_________.

The dotted line in the above image represents the circumference. The circumference of a circle is the distance around the circle. Circumference... View Article

A Modern Digital Computer Has (A) Large Memory. (B) Extremely High Speed. (C) Almost Unlimited Array. (D) All Of The Above.

The correct answer is (D) All of the above. A modern digital computer has Extremely high speed, Large memory and Almost unlimited accuracy.... View Article

A 10 M Long Potentiometer Wire Is Connected To A Battery Having A Steady Voltage. A Leclanche Cell Is Balanced At 4 M Length Of The Wire. If The Length Is Kept The Same, But Its Cross-Section Is Doubled, The Null Point Will Be Obtained At:

Sol: If the length of the potentiometer is identical, the null point will be obtained at some point because the potential gradient will not... View Article

Which Of The Following Functions Are Aperiodic ([X] Denotes Greatest Integer Function.) (A) f(x) = 1/x cos x. (B) f(x) = x + sin x. (C) f(x) = 2 + (-1)[x]. (D) (D) Both (A) and (B).

The correct answer is (D) Both (A) and (B) (A) f(x) = 1/x cos x and (B) f(x) = x + sin x. Explore more such questions and answers at BYJU’S.... View Article

State Henry’s Law.

Henry’S Law states that the partial pressure of a gas in the vapour phase is proportional to the model fraction of the gas in the solution.... View Article

What Happens To The Following After Fertilization Petals?

After fertilization, petals fall off. Petals are the most colourfull or brightly coloured part of a flower and they play an essential role by... View Article

Solve: (98 + 14) * 0 Is_____.

Sol: We know that for any number n multiplied by 0 is always 0, that is n × 0 = 0. The given expression (98 + 14) * 0 (98 + 14) * 0 =... View Article

A Square Of Side 4 Cm And Uniform Thickness Is Divided Into Four Equal Squares.The Square Portion A, Ab And D Is Removed And The Removed Portion Is Placed Over The Square B, Bc And D. What Will Be The New Position Of Centre Of Mass?

Sol: The centre of mass of each of the smaller squares is at the centre of the smaller square. The co-ordinates of the CM of the smaller... View Article

Which One Of The Following Is A Manmade Resource? (A) Water Cycle.(B) Tropical Forests.(C) Aquatic Ecosystem.(D) Medicines to treat cancer.

The correct answer is (D) Medicines to treat cancer. Water Cycle, Tropical Forests, and Aquatic Ecosystems are natural resources that exist... View Article

Longitudinal Strain Is Calculated Using The Formula: (A) Original Length * Change In Length.(B) Original Length – Change In Length.(C) Original Length / Change In Length.(D) Change In Length / Original Length.

The correct answer is (D) Change in length / original length. Longitudinal strain is calculated using the formula Change in length/ original... View Article

M	T	W	T	F	S	S
				1	2	3
4	5	6	7	8	9	10
11	12	13	14	15	16	17
18	19	20	21	22	23	24
25	26	27	28	29	30	31