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Questions asked by meena.p
Questions
14353
questions
1
answer selected
How many litres of ammonia are present in 3.4 kg of it? (N = 14, H = 1)
sat
chemistry
chemical-formulae
asked
Oct 15, 2018
1
answer
How many litres of ammonia are present in 3.4 kg of it? (N = 14, H = 1)
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
0
answers
The reaction between aluminium carbide and water takes place according to the following equation:$Al_4C_3+12H_2O \longrightarrow 3CH_4+4Al(OH)_3$ calculate the volume of $C H_4$ released from $14.4\;g$ of $Al_4 C_3$ by excess water at S.T.P. $(C = 12, Al = 27)$
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
What is the volume of 7.1 g of chlorine $(Cl=35.5)$ at S.T.P.
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
The formula of ethanol is $C_2H_5—OH$. Its molecular mass is
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
Convert 12 g of oxygen gas into mole
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
If one mole of carbon atoms weigh 12 grams, what is the mass (in grams) of 1 atom of carbon?
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
If an atom or atoms gain electrons or lose protons, the ion will have a negative charge. This kind of ion is called an anion. Ions normally are found as
sat
chemistry
chemical-formulae
asked
Oct 11, 2018
1
answer
Balanced equations have the same number of reactant atoms as the product atoms because the conservation of matter must apply in all regular chemical equations.
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
In the usual laboratory preparation equation for the reaction in question 2, what is the coefficient of $O_2$?
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
A compound that can be decomposed to produce oxygen gas in the lab is
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
The most abundant element in the earth's crust is ?
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
Balanced equations have the same number of reactant atoms as the product atoms because the conservation of matter must apply in all regular chemical equations.
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
Fluorine is assigned an oxidation number of 1 in all compounds because fluorine is the most electronegative element.
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
In the formula of a compound, the algebraic sum of the oxidation numbers must be 0 because oxygen's oxidation number in most compounds is ?
sat
chemistry
chemical-formulae
asked
Oct 10, 2018
1
answer
Balance the following equation: $SnO_2+H_2+Sn+H_2O$
sat
chemistry
chemical-formulae
asked
Oct 8, 2018
1
answer
Oxidation number of Cr in $K_2CrO_4$
sat
chemistry
chemical-formulae
asked
Oct 8, 2018
1
answer
A chemical can be defined as
sat
chemistry
chemical-formulae
asked
Oct 8, 2018
1
answer
In which of the following acid, which acid has oxidation reduction and complex formation properties
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
Self reduction is possible in which of following :
cl20052
sat
chemistry
oxidation & reduction
jeemain
unit8
redox-reactions-and-electrochemistry
q33
medium
asked
Oct 4, 2018
1
answer
When P reacts with caustic soda, the products are $PH_3$ and $NaH_2PO_2$. This reaction is an example of
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
When $Cl_2$ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from
cl111486
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
Amount of oxalic and present in a solution can be determined by its nitration with $kM_nO_4$ solution in the presence of $H_2SO_4$ . The nitration gives unsatisfactory result when carried out in the presence of Hcl because Hcl
sat
chemistry
oxidation & reduction
jeemain
question-paper-2
asked
Oct 4, 2018
1
answer
Calculate the volume of $0.01\;M\;KMnO_4$ solution required in acidic medium for complete oxidation of 100 ml of ferrous Solution whose strength is $3.6\;gL^{-1}$
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
The conversion of $PbO_2$ to $Pb(NO_3)_2$ is
sat
chemistry
oxidation & reduction
asked
Oct 4, 2018
1
answer
Burning of lime to give calcium oxide and carbon dioxide is
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
In the decomposition reaction of a hydrogen peroxide solution : $2H_2O_2 (aq) \to 2H_2O(l) +O_2(g)$
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
In the combustion reaction between butane $(C_4H_{10})$ and oxygen , the oxidation state of carbon goes from
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
Which of the following statement is NOT true ?
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
of the following , the element that does NOT react with hydrochloric acid to produce hydrogen gas is
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
When elemental bromine $(Br_2)$ reacts with a solution of sodium iodide (Nal)
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
Reduction agents are substances that
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
Which of the following is true ?
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
The reaction type that could possibily be viewed as a redox reaction in which only one substance is present in the reactants.
sat
chemistry
oxidation & reduction
asked
Oct 3, 2018
1
answer
The reaction type that does not generally involved the transfer of electrons and is not viewed as a redox reaction .
sat
chemistry
oxidation & reduction
asked
Sep 27, 2018
1
answer
The reaction type that can be viewed as redox often involving hydrocarbon fules and oxygen releasing heat and light .
sat
chemistry
oxidation & reduction
asked
Sep 27, 2018
1
answer
The reaction type that can be viewed as redox often involving hydrocarbon fueld and oxygen releasing heat and light
sat
chemistry
oxidation & reduction
asked
Sep 27, 2018
1
answer
What does each letter of the ideal gas law represent?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
If 1.0 mol of helium gas (He) at standard temperature and pressure (STP) has a volume of 22.4L, how many moles of carbon tetrachloride gas $(CCl_4)$ will be present in a container with a volume of 22.4L?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
If the temperature of a gas increases, what happens to the pressure?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
In which condition can real gas obey closely the ideal gas equation?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
The perfect example of an ideal gas is
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
A gas mixture has $30\% O_2, 40\% H_2,$ and $30\% N_2$ with molar volume of $N_2\; 10 L/mole$ at temperature $27^{\circ}C$, what is the partial pressure of $H_2$?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
The fraction of gas in a container is 0.5, if the total volume of the container is 6 liter, what is the volume of the gas?
sat
chemistry
gases and gas laws
asked
Sep 26, 2018
1
answer
What happens to the pressure of a closed gaseous system when the temperature increases two-fold?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
0
answers
A gas in a 30.0mL container is at 1.05atm is compressed to a volume of 15.0mL. What is the new pressure of the container? Possi
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
Which of the following is not the unit of R?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
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