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The Speeds Of Three Cars Are In The Ratio 2:3:4. What Is The Ratio Between The Times Taken By These Cars To Travel The Same Distance?

Speed is always inversely proportional to time, \(\begin{array}{l}\Rightarrow s \propto\frac{1}{t} \end{array} \) Therefore, the ratio of time taken = \(\begin{array}{l}... View Article

When hydrochloric acid is added to cobalt nitrate solution at room temperature, the following reaction takes place and the reaction mixture becomes blue. On cooling the mixture, it becomes pink. On the basis of this information mark the correct answer. [CO(H₂O)₆]₃+(Aq) + 4Cl−(Aq) ⇋ [COCl4]₂−(Aq) + 6H₂O (L): (A) △h < 0 for the reaction (B) △h > 0 for the reaction (C) △h = 0 for the reaction (D) None Of These

The correct answer is (A) △h < 0 For The Reaction Explore more such questions and answers at BYJU’S.

Arrange The Following Species In The Increasing Order Of Their Ionic Radii Giving Reasons. Mg2+,Al3+,O2-,Na+, N3-,F-

The order of ionic radii will be in increasing order: Al^{3+} < Mg^{2+} < Na^{+} < F^{-} < O^{2-} <... View Article

What Do You Mean By Marketing Management?

Marketing management refers to planning, directing, organising, and controlling the activities involved in the exchange of goods and services between... View Article

Find The Value Of 8P8

Sol: The value of \(\begin{array}{l} ^{8}P_{8} is\end{array} \) \(\begin{array}{l} \Rightarrow ^{n}P_{r} = \frac{n!}{(n – r)!}\end{array} \) \(\begin{array}{l} \Rightarrow ^{8}P_{8} =... View Article

Two identical particles each of mass M and charge Q are placed a certain distance part. If they are in equilibrium under mutual gravitational and electric force, then calculate the order of Q/M in SI units.

As the given system of charges are in equilibrium, \(\begin{array}{l} F_{e} = F_{g} \end{array} \) \(\begin{array}{l} F_{e} \end{array} \)is the... View Article

The Anion Of Acetylacetone (Acac) Forms Co(Acac)3 Chelates With Co3+. The Rings Of The Chelates Are ______ (A) Six Membered (B) Five Membered (C) Four Membered (D) Three Membered

The correct answer is (A) Six Membered Explore more such questions and answers at BYJU’S.

If The Interatomic Spacing In A Steel Wire Is 2.8×10−10m And Y Steal =2×10 11 N/M2, Then Force Constant In N/M Is_______ (A) 56 (B) 5.6 (C) 0.56 (D) 560

Interatomic force constant = Y * inter atomic distance \(\begin{array}{l} 2 * 10^{11} * 2.8 * 10^{-10} \end{array} \) =... View Article

The Balance Of Carbon Dioxide And Oxygen In The Atmosphere Is Maintained By ______.(A)C4 Plants. (B) Photolysis. (C) Photorespiration. (D) Both Photosynthesis And Respiration

The correct answer is (D) Both Photosynthesis And Respiration The balance of oxygen and carbon dioxide is maintained in the... View Article

Give Reason :Hf Is Least Volatile And Hcl Is Most Volatile Amongst Hydrogen Halides

The boiling point increases in covalent compounds with the increase in the molecular mass as van der Waals’ forces increases.Thus... View Article

Write Any One Solution Of Equation X + 2y = 7.

For any given solution, solving the value of y we will find the corresponding value of x. This is a... View Article

A Number Is Increased By 20% And The Increased Number Is Decreased By 20%.Find The Increase Or Decrease Percent.

Let the number be =100 Increase in the number = 20% of 100 = \(\begin{array}{l} \frac{20}{100} * 100 \end{array} \)... View Article

Average Of 8 Numbers Is 20, That Of The First Two Is 15.5 And That Of The Next Three Is 211/3, The 6th Is Less Than The 7th By 4 And 7 Less Than The 8th. What Is The Last Number?

Sol: Sum of 8 numbers = 20 × 8 = 160 Sum of first 5 numbers = \(\begin{array}{l} 15.5 *... View Article

The Rent Paid To Landlord Is Credited To

The rent paid to landlord is credited to the cash account Explore more such questions and answers at BYJU’S.

An Ellipse Is Described By Using An Endless String Which Is Passed Over Two Pins. If The Axes Are 6 Cm And 4 Cm, The Length Of The String And Distance Between The Pins Are ____________

As we know: \(\begin{array}{l} \frac{x^{2}}{a^{2}} + \frac{y^{2}}{b^{2}} = 1 \end{array} \) Therefore, a = 6cm and \(\begin{array}{l} a^{2} = 36... View Article

When A Gas Filled In A Closed Vessel Is Heated Through 1°C, Its Pressure Increases By 0.4 %. What Is The Initial Temperature Of The Gas?

Here the volume is constant. Therefore, \(\begin{array}{l} P \propto T\end{array} \) = \(\begin{array}{l} \frac{P_{1}}{P_{2}} = \frac{T_{1}}{T_{2}} \end{array} \) = \(\begin{array}{l}... View Article

The Radius Of A Circle Is Stated As 2.12 Cm. Its Area Should Be Written As

Given: The radius of a circle, r = 2.12 cm The area of a circle, A = \(\begin{array}{l} \Pi r^{2}... View Article

If 3X = 5Y =75Z Show That Z = Fracxy/2X+Y

Given \(\begin{array}{l} 3^{x} = 5^{y} = (75)^{z} \end{array} \) \(\begin{array}{l} 3^{x} = 5^{y} = (75)^{z} = k \end{array} \) =... View Article

If Both A And B Are Rational Numbers, Find The Values Of A And B In Each Following Equalities (1) 3+Sqrt7/3-sqrt7 = A + Bsqrt7 (2) 5+Sqrt3/7-4Sqrt3 = 47A + Bsqrt3

(1) \(\begin{array}{l} 3+Sqrt7/3-sqrt7 = A + Bsqrt7 \end{array} \) Given: \(\begin{array}{l} \frac{3 +\sqrt{7}}{3 -\sqrt{7}} = a + b\sqrt{7} \end{array} \)... View Article

The Heat Of Combustion Of Benzene At 270C Found By Bomb Calorimeter I.E. For The Reaction C6H6+712O2→6Co2+3H2O Is 780K.Cal Mol – 1. The Heat Evolved On Burning 39G Of Benzene In An Open Vessel Will Be

Given Reaction \(\begin{array}{l} C_{6}H_{6} (l) + 7\frac{1}{2}O_{2}(g) \rightarrow 6CO_{2}(g) + 3H_{2}O(l) \end{array} \) In the above given reaction, oxygen \(\begin{array}{l}... View Article

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