Chemistry questions
29404 published questions with worked solutions.
- Given below are two statements : Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode...
- The alkane from below having two secondary hydrogens is :
- Niobium (Nb) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4d orbitals. The value of x + y is...
- Consider the following cases of standard enthalpy of reaction ( H_f^o in kJ mol^ -1 ) C_2H_6(g) + 7 2 O_2(g) 2CO_2(g) + 3H_2O( )...
- 20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is ______ 10^ -2 M....
- The effect of temperature on spontaneity of reactions are represented as: H | S | Temperature | Spontaneity (A) + | – | any T |...
- The - Helix and - Pleated sheet structures of protein are associated with its:
- Consider the reaction X_2Y(g) X_2(g) + 1 2 Y_2(g) The equation representing correct relationship between the degree of...
- Given below are two statements: Statement (I): The boiling points of alcohols and phenols increase with increase in the number of...
- Given below are two statements: Statement (I) : For a given shell, the total number of allowed orbitals is given by n². Statement...
- Match List-I with List-II. List - I: (A) Bronze (B) Brass (C) UK silver coin (D) Stainless Steel List - II: (I) Cu, Ni (II) Fe,...
- Identify the coordination complexes in which the central metal ion has d^4 configuration. (A) [FeO₄]²⁻ (B) [Mn(CN)₆]³⁻ (C)...
- Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting point is :
- pH of water is 7 at 25°C. If water is heated to 80°C, it's pH will :
- Consider a binary solution of two volatile liquid components 1 and 2, x_1 and y_1 are the mole fractions of component 1 in liquid...
- 0.01 mole of an organic compound (X) containing 10% hydrogen, on complete combustion produced 0.9 g H₂O. Molar mass of (X) is...
- When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is _____....
- The bond dissociation enthalpy of X_2 H^ _ bond calculated from the given data is _____ kJ mol^ -1 . (Nearest integer) M^+X^-(s)...
- A compound 'X' absorbs 2 moles of hydrogen and 'X' upon oxidation with KMnO_4|H^+ gives CH_3–CO–CH_3, CH_3–CO–OH and...
- The element that does not belong to the same period of the remaining elements (modern periodic table) is: