Recent questions tagged sat

In a constant volume process, internal energy change is equal to

asked Aug 26, 2018 by meena.p

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Entropy is a

asked Aug 26, 2018 by meena.p

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A reaction will reach equilibrium when the system's entropy __________.

asked Aug 26, 2018 by meena.p

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$N_2(g) \qquad \Delta S_f=191.5\;J \\ O_2(g) \qquad \Delta S_f=205\;J \\ NO\qquad \Delta S_f=210.7\;J $ <br> What is the change in entropy for the following reaction? $N_{2(g)}+O_{2(g)}→2NO$

asked Aug 26, 2018 by meena.p

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Which of the following reactions represents a negative change in entropy?

asked Aug 26, 2018 by meena.p

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Which of the following does not represent an increase in entropy?

asked Aug 26, 2018 by meena.p

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The entropy of an isolated system always and becomes a at the state of equilibrium.

asked Aug 26, 2018 by meena.p

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Which of the following is true?

asked Aug 26, 2018 by meena.p

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The reaction $2KClO_{3(s)} \longrightarrow 2KCl_(s)+3O_{2(g)}$ is a(n)

asked Aug 23, 2018 by meena.p

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What happens when carbon dioxide is passed in lime water?

asked Aug 23, 2018 by meena.p

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Calculate the acid dissocation constant $K_a$ at $298\;K$ for a $0.010\;mol\;dm^{-3}$ solution of propanoic acid, $CH_3CH_2COOH$ The pH of this solution is $3.43$

asked Aug 23, 2018 by meena.p

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The correctly balanced equation for $FeS_2 +O_2 \to Fe_2O_3 +SO_2$ is ________

asked Aug 23, 2018 by meena.p

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Breaking of lead bromide into lead and bromine is an example of __________.

asked Aug 23, 2018 by meena.p

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Heat is evolved during:

asked Aug 23, 2018 by meena.p

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Oxidation is a process which involves:

asked Aug 23, 2018 by meena.p

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In the reaction : $2H_2S+SO_2\to 2H_2O+ 3S,$ choose the statement which is false ?

asked Aug 23, 2018 by meena.p

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Chemical changes are __________.

asked Aug 21, 2018 by meena.p

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Which of the following statements is not correct?

asked Aug 21, 2018 by meena.p

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Which of the following gives the correct increasing order of acidic strength?

asked Aug 21, 2018 by meena.p

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The symbol (aq) means:

asked Aug 21, 2018 by meena.p

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Ions that do not participate in a chemical reaction are ____ ions

asked Aug 21, 2018 by meena.p

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The activity series of metals is used to determine whether or not a ______ reaction has occurred.

asked Aug 21, 2018 by meena.p

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A reaction that has oxygen as a reactant and usually has carbon dioxide and water as products is a _____ reaction.

asked Aug 21, 2018 by meena.p

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According to the law of conservation of mass, the total mass of the reacting substances is

asked Aug 21, 2018 by meena.p

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Iron + Sulfur $\to$Iron sulfide $[Fe + S \to FeS]$ is an example of

asked Aug 21, 2018 by meena.p

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Acidic hazardous wastes are neutralised with slaked lime, caustic soda or sodium hydroxide.

asked Aug 21, 2018 by meena.p

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Common reagents for neutralising acid wastes are ____

asked Aug 21, 2018 by meena.p

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In the figure given below $DE \parallel QR$ and $AP$ and $BP$ are bisectors of $\angle EAB$ and $\angle RBA$ . Then $\angle APB$ is equal to

asked Aug 20, 2018 by meena.p

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Which of the below lines are parallel

asked Aug 20, 2018 by meena.p

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How many triangles can be drawn having its angles as $45^{\circ},64^{\circ}$ and $72^{\circ}$ ?

asked Aug 20, 2018 by meena.p

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The value of $a$ for which the line $l$ and $m$ are parallel

asked Aug 20, 2018 by meena.p

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In the figure below $OP \parallel RS, \angle OPQ=110^{\circ}$ and $\angle QRS=130^{\circ}$ , then $ \angle PQR$ is equal to

asked Aug 20, 2018 by meena.p

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In $\Delta PQR, \angle R= \angle P$ and $QR=4 \;cm$ and $PR=5\;cm$ then the length of $PQ$ is

asked Aug 20, 2018 by meena.p

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If ABC is a triangle and D is a point on BC such that AD bisects $\angle BAC$, then

asked Aug 20, 2018 by meena.p

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If ABC and PQR are triangles $AB= QR,BC=PR$ and $CA=PQ$ then

asked Aug 20, 2018 by meena.p

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In $\Delta ABC,BC=AB$ if $\angle B=80^{\circ}$ than $\angle A=$

asked Aug 20, 2018 by meena.p

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Which of the following is not a criterion for congruence of triangle ?

asked Aug 20, 2018 by meena.p

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For what value $x+y$ will ABC be a straight line ?

asked Aug 20, 2018 by meena.p

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If one of the angle of a triangle is $130^{\circ}$, then the angle between the bisectors of the other two angles can be

asked Aug 20, 2018 by meena.p

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The angles of a triangle are in the ratio $5:3:1$ the triangle is

asked Aug 17, 2018 by meena.p

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The exterior angle of a triangle is $105^{\circ}$and its two interior opposite angles are equal. Each of the equal angle is

asked Aug 17, 2018 by meena.p

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If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

asked Aug 17, 2018 by meena.p

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In the figure given above $AB \parallel CD \parallel EF \parallel $ and $PQ \parallel RS$. $\angle RQD=25^{\circ}$ and $\angle CQP=60^{\circ}$ then $\angle QRS$ is equal to

asked Aug 17, 2018 by meena.p

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Find the value of $x$ in the figure given below :

asked Aug 17, 2018 by meena.p

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Two lines $l_1$ and $l_2$ are parallel to each other as shown , find the value of x+y

asked Aug 17, 2018 by meena.p

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If line $l_1$ is parallel to line $l_2$ , than $x^{\circ}=$

asked Aug 17, 2018 by meena.p

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In the figure $\overline{AB} \parallel \overline{CD}$ and $\overline{AD}$ bisects $\angle CAB$, what is the measure of $\angle ADC$ ?

asked Aug 17, 2018 by meena.p

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Glacial acetic acid , pure $HC_2H_2O_2(FW=60.0)$ has concentration of $17.54\;M$ . If $85.5\;mL$ of glacial acetic are diluted to 250 mL. What is the acetic acid concentration ?

asked Aug 16, 2018 by meena.p

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What happens when zinc reacts with sodium hydroxide?

asked Aug 16, 2018 by meena.p

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If $0.050\;mL$ of $0.6\;M\;HCl$ is added to 400 mL of $10^{-5}\;M\;HCl$ what is the resulting pH?

asked Aug 16, 2018 by meena.p

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