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Identify the correct statements from the following: (a) $CO_2(g)$ is used as a refrigerant for ice cream and frozen food. (b) The structure of $C_{60}$ contains twelve six-carbon rings and twenty-five five-carbon rings. (c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline. (d) CO is a colorless and odorless gas.
The correct statement among the following is :
In which of the following pairs, both the species are not isostructural?
Al2O3 can be converted to anhydrous AlCl3 by heating:
A compound among the following that is least likely to behave as a Lewis base is:
Which one of the following species has a plane triangular shape?
0.33% of iron (by weight) is present in hemoglobin (Molecular wt = 67200). The number of iron atom(s) in one molecule will be:
The maximum number of molecules is present in:
Which of the following is the most basic oxide?
Find the molarity of liquid HCl if the density of liquid HCl is $1.17\text{ g/cc}$.
1 M, 2.5 litre NaOH solution is mixed with another 0.5 M and 3 litre NaOH solution. The molarity of the resultant solution will be:
An organic compound contains 80 % (by wt.) carbon and the remaining percentage of hydrogen. The empirical formula of this compound is: [Atomic wt. of C is 12, H is 1]
Calculate the mass of 95% pure $CaCO_3$ that will be required to neutralize 50 mL of 0.5 M HCl solution according to the following reaction: $$ CaCO_3(s) + 2HCl(aq) \rightarrow CaCl_2(aq) + CO_2(g) + 2H_2O(l) $$ [Calculate up to the second place of decimal point]
Match List-I with List-II: | List-I (Quantities) | List-II (Corresponding Values) | | :--- | :--- | | (a) 4.48 litres of $O_2$ at STP | (i) 0.2 mole | | (b) $12.022 \times 10^{22}$ molecules of $H_2O$ | (ii) $12.044 \times 10^{23}$ molecules | | (c) 96 g of $O_2$ | (iii) 6.4 g | | (d) 88 g of $CO_2$ | (iv) 67.2 litres at STP | (Given - Molar volume of a gas at STP = 22.4 L)
The density of a $2 \text{ M}$ aqueous solution of $NaOH$ is $1.28 \text{ g/cm}^3$. The molality of the solution is: [molecular mass of $NaOH = 40 \text{ g mol}^{-1}$]
Among the following, isoelectronic species are:
A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is: (Given atomic mass of A = 64; B = 40; C = 32 u)
Which of the following contains the highest number of helium atoms?
A 1 M solution of a compound 'X' has a density of 1.25 g/mL. If the molar mass of compound X is 85 g, what is the molality (m) of the solution?
E. coli cells with a mutated z gene of the lac operon cannot grow in a medium containing only lactose as the source of energy because-