Question
Classify the following substances as element, compounds and mixture Air, mercury, oxygen, glucose, common salt, marble, potassium, cement, copper?

Answer

Element : Mercury, oxygen, copper and potassium.
Compound : Glucose, common salt and marble.
Mixture : Air and cement

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is oxidation state of Cr in [Cr(H2O)6]Cl3
Why reactivity of alkanes is less than that of alkenes and alkynes?
Among the elements Li, K, Ca, S and Kr, which one is expected to have the lowest first ionisation enthalpy and which one has the highest first ionisation enthalpy?
Predict the major product (s) of the following reactions and explain their formation.
$\text{H}_3\text{C}-\text{CH}=\text{CH}_2\xrightarrow [\text{HBr}] {(\text{Ph-CO-O})_2}$
$\text{H}_3\text{C}-\text{CH}=\text{CH}_2\xrightarrow{\text{HBr}}$
A reaction between ammonia and boron trifluoride is given below:
$
: NH_3+B F_3 \rightarrow H_3 N: BF_3
$
Identify the acid and base in this reaction. Which theory explains it? What is the hybridization of B and N in the reactants?
Which hybrid orbitals are used by carbon atoms in the following molecules?
(a) $CH _3- CH _3$(b) $CH _3- CH = CH _2$(c) $CH _3- CH _2- OH$(d) $CH _3- CHO$(e) $CH _3 COOH$
Give one example of each-dehydration of alcohol and dehydrohalogenation of haloalkane to form alkene.
Write the expression for equilibrium constant Kp for the reaction:
$3\text{Fe(s)}+\text{4H}_2\text{O(g)}\rightleftharpoons\text{Fe}_3\text{O}_4(\text{s})+4\text{H}_2(\text{g})$
Arrange the following in order of decreasing bond angles.
  1. $\text{CH}_4, \text{NH}_3, \text{H}_2\text{O}, \text{BF}_3, \text{C}_2\text{H}_2$
  2. $\text{NH}_3, \text{NH}^‑_2, \text{NH}^+_4$
Out of H and H2, the latter has higher first ionisation energy while out of 0 and O2, the former has higher first ionisation energy. Explain why?