Sum of length of any two sides of a triangle should be greater than the third side .$5+1 <7, 5+2...

There are right angled triangles whose sides are $.3$, $.4$ and hypotenuse is $.5$ ( for example ). ...

Solution : $3x-10$= base angle$x=$ vertex angle$\therefore x=(3x-10)+(3x-10)=180^{\circ}$=>$7x-2...

Solution : Height of the triangle $=5+7=12\;cm$$a^2+b^2=c^2$=>$5^2+12^2=13^2$Hence the third side...

Solution : $BF=EC$ (given)$BF+FC=EC+FC$=> $BC= EF$

Solution :$\angle EAB+\angle RBA =180^{\circ}$$\large\frac{1}{2} \angle EAB+\large\frac{1}{2} \angle...

Solution : Sum of two interior angle should be $180^{\circ}$In fig(i) $132^{\circ}+48^{\circ}=180^{\...

Solution : $\angle PQR = 70^{\circ}$ (linear pair)$\therefore 70 + x = 135^{\circ}$ (Sum of two int...

Solution : Thermochemical equation for the formation of HCl is:$0.5H_2(g) + 0.5Cl_2(g) \longrightarr...

The total amount of heat change in a chemical reaction is the same whether the reaction is carried ...

Solution : (b) the nature of intermediate reaction steps

Solution : AH negative shows that the reaction is spontaneous . Higher value for Zn shows that the r...

Solution : $CH_4 \to C +4H, \delta H=320$$E_{C-H}=90\;cal$$C_2H_6 \to 2C +6H$$\Delta H=360$$\therefo...

Solution : 4g H2=2 moles. Bond energy for 1 mole of $H_2 = \large\frac{208}{2}$$=104kcal.$

Solution : This is because the internal energy of an ideal gas depends only on the temperature.

Solution : At constant pressure, (dQ)=dh where h=u+pv is the specific enthalpy of the system.

Solution : A reaction will have a positive change in entropy when the disorder of the system is incr...

Solution : https://clay6.com/mpaimg/sat71.jpg$OP \parallel RS$ (given) and $RL$ is the transversal$\...

Solution :Sum of two interior opposite angle is equal to one exterior angle.But the two angles$x+x=1...

Solution : If $m(\angle A) > m \angle B > m \angle C$ then $BC > AC > AB$If $m \angle A ...

Solution : By triangle inequality the area, Sum of the two sides should be greater than or equal to ...

Solution : $3x-10$= base angle$x=$ vertex angle $\therefore x=(3x-10)+(3x-10)=180^{\circ}$=>$7x-...

Solution : Area of the triangle ABC is equal to the distance from A to B multiplied by the distance ...

Solution : The area of the triangle cannot be smaller than its hypotenuse length or bigger than its ...

Solution : The sum of the percentage of carbon, hydrogen, and chlorine is not 100 % Hen...

Solution : https://clay6.com/mpaimg/sat68.jpg$cos A = \frac{4}{8} = \frac{1}{2} $. Hence $A = 60^{\c...

Solution : $l \parallel m$$\therefore EAB =ABH$ (alternate interior angles) $\large\frac{1}{2}$$\an...

Solution : $2x+3x+4x=180^{\circ}$$9x=180^{\circ}$$x=20^{\circ}$$\therefore $ The angles are $2 \time...

Solution : Change in enthalpy occurs when heat is given to a system at constant pressure.

Solution : For an ideal gas, pv=RT

Solution : In a constant volume process, there is no work other than the pdV work.

Solution : Fact about entropy and unit of entropy is J/K.

Solution : Equilibrium is the basis of entropy, which can essentially be thought of as the distribut...

Solution : The change in entropy is calculated by:When ΔS cannot be measured, it can be calculated f

Solution : Entropy for phases are Gas>Liquid>Solid. A salt dissolving into solution has a posi...

Solution : Of phases, from greatest to least entropy is gas>liquid>solid. Dissolving a salt in...

Solution : If entropy of an isolated system varies with some parameter, then there is a certain valu...

Solution : For an isolated system which does not undergo any energy interaction with the surrounding...

Solution : A decomposition reaction is a type of chemicalreaction in which a single compound breaks ...

Solution :When carbon dioxide is passed through lime water for a short time,it turns lime water milk...

Solution : use the pH to calculate $[H^+]$ at equilibrium $[H^+]=10^{-pH}=10^{-3.43}=3.7 \times 10^{...

Solution : $(d)\;4FeS_2 +11 O_2 \to 2Fe_2O_3+8SO_2$

Solution : Decomposition Reaction - A decomposition reaction is a type of chemicalreaction in which ...

Solution : A combustion reaction is a type of chemical reaction where a compound and an oxidant is r...

Solution : Oxidation is the process when oxygen combines with an element, changing the appearance of...

Solution : In this reaction, $SO_2$ is changing to S.This is the removal of oxygen from $SO_2$. Remo...

Solution : Chemical changes occur when a substance combines with another to form a new substance, ca...

Solution : (b) All metal oxides react with water to give salt and acid

Solution : (a) Water < Acetic acid < Hydrochloric acid

Solution : The symbol (aq) represents aqueous solution. When it is written after a chemical formula ...