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The Activation Energy For The Reaction 2Hi (G)→H2 I2(G) Is 209.5 209.5Mol −1 At 581 K. Calculate The Fraction Of Molecules Of Reactants Having Energy Equal To Or Greater Than The Activation Energy.

Sol: The Arrenhius Equation is given by, \(\begin{array}{l} k = Ae \frac{-E_{a}}{RT} \end{array} \) Here in this equation, Ea is... View Article

Which force is responsible for holding the solar system together?

Answer: The gravitational force of the sun in the solar system is responsible for holding the solar system together. The... View Article

Find the correct statement from the given. (A) (+) Tartaric acid and Neso tartaric acid are tautomers. (B) (+) Tartaric Acid And (−) Tartaric acid are Enantiomers. (C) (+) Tartaric Acid And (−) Tartaric Acid are Diastereoisomers. (D) (+) Tartaric Acid And Meso Tartaric AcidaAre Diastereoisomers.

The correct answer is (D) (+)Tartaric Acid And Meso Tartaric Acid Are Diastereoisomers. Explore more such questions and answers at... View Article

The Pallava King Who Destroyed Vatapi And Assumed The Title Of Vatapikonda Was(A)Nandivarma. (B)Aparijitavarma.(C)Mahendravarman I.(D)Narasimhavarman I.

The correct answer is (D)Narasimhavarman I. Narasimhavarman I was a king of the Pallava dynasty who ruled South India from... View Article

On What Factor Do The Mutual Inductance Depend Between Two Coils(A)Cross-sectional Area Of The Common Core. (B) The Number Of Their Turns. (C) Permeability Of The Core. (D) All Of These

The correct answer is (D) All Of These. The mutual inductance depends on all of the above factors. Explore more... View Article

Calcium Imide on hydrolysis gives gas (P) which on oxidation by bleaching powder gives gas (Q), Gas (Q) on reaction with magnesium gives compound (R) which on hydrolysis again gives gas (P). Identify (P), (Q), And (R):(A) N2N2O5,Mg(NO3)2.(B) N2,NH3,MgNH.(C) NH3,NO2,Mg(NO2)2.(D) NH3,N2,Mg3N2.

The correct answer is (D) NH_{3},N_{2,Mg_{3}N_{2}. Calcium imide on hydrolysis gives gas NH_{3} and Ca(OH)_{2}. So p is NH_{3} CaNH... View Article

A Sum Of Money At Simple Interest Amounts To Rs.815 In 3 Years And To Rs.854 In 4 Years. The Sum Is(A) 650. (B) 690. (C) 698. (D) 700.

The correct answer is (C) 698. Simple Interest (S.I) for one year = Rs.854 – Rs.815 = Rs.39 Simple Interest... View Article

SnO Is Called An Amphoteric Oxide. Give An Explanation For It.

Amphoteric oxides refer to those oxides, which behave as both basic and acidic oxides. Tin(II) oxide (SnO) is a called... View Article

Ionisation Enthalpy (Δ Ih1Kj Mol −1) For The Elements Of Group 13 Follows The Order: (A) B > Al < Ga > In < Tl.(B) B > Al > Ga > In > Tl. (C) B < Al > Ga < In > Tl.(D) B < Al > Ga > In > Tl.

The correct answer is (A) B > Al < Ga > In < Tl. On moving down the group in... View Article

Oxygenated Blood Returns From Lungs To The Heart Through______.(A) Pulmonary Vein. (B) Coronary Vein. (C) Pulmonary Artery. (D) Coronary Artery.

The correct answer is (A) Pulmonary Vein. Pulmonary veins are the largest vein that which play an essential role by... View Article

Branched Chain Of Lipids Occur In The Cell Membranes Of______.(A) Mycoplasms.(B) Streptomyces.(C) Actinomycetes.(D) Archaebacteria.

The correct answer is (D) Archaebacteria. Branched Chain Of Lipids Occur In The Cell Membranes Of Archaebacteria, the primitive bacteria.... View Article

Volume And Total Surface Area Of A Solid Hemisphere Are Equal In Magnitude. The Volume Is Expressed In Cm3 And The Area Is Expressed In Cm2. Find The Radius Of The Hemisphere.

Sol: Volume of a hemisphere of radius, r =\(\begin{array}{l} \frac{2}{3}\Pi r^{3}\end{array} \) Total Surface Area of a hemisphere of radius,... View Article

Melt:Liquid::Freeze:______

Melt:Liquid::Freeze:solid As on melting liquid is formed, similarly on freezing solid is formed. For example: As on melting ice, water... View Article

Mention The Qualifications Necessary For Election As President Of India.

According to Article 58 of the constitution, The Qualifications Necessary For Election As President Of India are: He/she should be... View Article

The Working Of A Dynamo Is Based On The Principle Of_______(A) Heating Effect Of Current. (B)Chemical Effect Of Current. (C) Electromagnetic Induction. (D)Magnetic Effect Of Current.

The correct answer is (C) Electromagnetic Induction. Explore more such questions and answers at BYJU’S.

Bonding Element In A Strain Gauge Must Have __________(A) Low Insulation Resistance.(B) High Insulation Resistance. (C) Zero Insulation Resistance.(D) Infinite Insulation Resistance.

The correct answer is (B) High Insulation Resistance. In a strain gauge, the bonding element must have a high value... View Article

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