What Are Essential Mineral And Non-Mineral Plants Elements?
Mineral elements are those elements that plant absorbs from the soil. The plant requires many essential elements for steady growth... View Article
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Monochromatic Light Of Wavelength 6328 Nm Is Produced By A Helium-Neon Laser. The Power Emitted Is 9.42m W. Answer The Following:
Sol: Given: Wavelength of the monochromatic light, λ = 632.8 nm = 632.8 × 10−9 m Power emitted by the... View Article
Burning Of Kerosene In A Lantern Is A Physical Or A Chemical Change. Give Reason.
The burning of kerosene in a lantern is a chemical change. When kerosene burns, it combines with atmospheric oxygen to... View Article
A Playground Merry Go Round Of Radius, R = 200 M Has A Moment Of Inertia I = 250 Kg. M2 And Is Rotating At 10.0 Rev/Min, About A Frictionless, Vertical Axles. Facing The Axle A 25.0 Kg Child Hops Onto The Merry Go Round And Managers To Sit Down On The Edge. What Is The New Angular Speed Of The Marry Go Round?
Sol: Given: Radius, R = 200 M A moment of inertia, I = 250 kg. m2 Child weight = 25... View Article
In Any Group Second Period Element Exhibit Anomalous Properties. Correct Statements About This Is/Are: (A) All Second-Period Elements Exhibit A Diagonal Relationship. (B) Generally, Maximum Covalency Of The First Member Of Each Group Cannot Exceed Four. (C) Anomalous Behaviour Is Due To Small Size, Large Charge/Radius Ratio, And High Electronegativity Of The Elements. (D) The First Member Of The P-Block Element Displays Greater Ability To Form P Π-D Π Multiple Bonds To Itself And To The Other Second Period Elements, Compared To Subsequent Members Of The Group
The correct answer is (C) Anomalous Behaviour Is Due To Small Size, Large Charge/Radius Ratio And High Electronegativity Of The... View Article
Find dy/dx, If y = log (sin 3x).
y = log(sin 3x) Differentiating with respect to x, we get, \(\begin{array}{l}\frac{dy}{dx} = \frac{1}{sin\; 3x} * 3 \;cos\; 3x\end{array} \)... View Article
Describe The Hershey And Chase Experiment. Write The Conclusion Drawn By The Scientists After Their Experiment.
Alfred D. Hershey and Martha Chase (1952) used radioactive phosphorus ( 32 P) and radioactive sulphur ( 35 S). They... View Article
How Did The Revolution Affect The Everyday Life Of The People Of France?
The everyday life of the French people was deeply affected by the revolution. The abolition of censorship was removed. Equality... View Article
About _____ Per Cent Of The Raw Material Used To Make Paper Comes From Trees. (A) 40. (B) 60 .(C) 80. (D) 95.
The correct answer is (D) 95. About 95 percent of the raw material used to make paper, though, comes from... View Article
What Is The IUPAC Name Of CH3CH2 – O – CH2CH2CH3?
The IUPAC name of CH3CH2 – O – CH2CH2CH3 is 1-ethoxypropane. It is ether and ethers are named alkoxy alkanes.... View Article
Mottled Chlorosis Occurs Due To Deficiency Of (A) Sulphur. (B) Nitrogen. (C) Potassium. (D) Phosphorus.
The correct answer is (C) Potassium. Mottled chlorosis is caused due to the deficiency of potassium in plants. Potassium is... View Article
As A Result Of Osmosis, The Volume Of The Concentrated Solution______. (A) Gradually Increases. (B) Gradually Decreases. (C) Suddenly Increases.(D) Remains Constant.
The correct answer is (A) Gradually Increases. As a result of osmosis, the volume of the concentrated solution gradually increases.... View Article
Tap Key Is Used Make And Break The Circuit (True/False)
The given statement is true. The device used to make or break a circuit is called a switch or a... View Article
The Nucleus Of The Hydrogen Atom Is Called A (A) Proton.(B) Neutron.(C) Nucleons.(D) Electron.
The correct answer is (A) Proton. The nucleus of a hydrogen atom is called a proton as it has only... View Article
Scattered Vascular Bundles Occur In (A) Dicots. (B) Monocots. (C) Bryophytes. (D) Pteridophytes.
The correct answer is (B) Monocots. (A) Dicots– In dicots, vascular bundles are present in the form of rings. (B)... View Article
Radial Vascular Bundles Occur In (A) Stem. (B) Dicot Roots. (C) Monocot Roots. (D) Both Dicot Roots And Monocot Roots.
The correct answer is (B) Both monocot and dicot roots. In the vascular bundles, xylem and phloem are present on... View Article
The Isotopes Of Hydrogen Are (A) Tritium. (B) Protium. (C) Deuterium. (D) All Of These.
The correct answer is (D) All Of These. The hydrogen element has three naturally existing isotopes: hydrogen, deuterium and tritium.... View Article
A Bus Starts From City X. The Number Of Women In The Bus Is Half The Number Of Men. In The City Y, 10 Men Left The Bus And Five Women Boarded Into It. Now, the Number Of Men And Women Becomes Equal. In The Beginning, How Many Passengers Entered The Bus?
Let the number of men in a bus be x Let the number of women in a bus be\(\begin{array}{l} \frac{1}{2}\end{array}... View Article
Which Of The Following Is Correctly Categorised? (A) Calcitonin And Thymosin → Thyroid Hormones. (B) Secretin And Rhodopsin → Polypeptide Hormones. (C) Troponin And Myosin → Complex Proteins In Striated Muscles. (D) Pepsin And Prolactin → Digestive Enzymes Secreted In Stomach.
The correct answer is (C) Troponin And Myosin → Complex Proteins In Striated Muscles. Explore more such questions and answers... View Article
BCl3 Does Not Exist As Dimer But BH3 Exists As Dimer (B2H6). Explain Why?
BCl3 does not exist as a dimer, but BH3 exists as dimer B2H6 because, large-sized chlorine atoms do not fit... View Article
