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Complete Current Electricity in 60 Mins
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♨️💢Classification of solids as ionic, metallic, molecular, network (covalent) or amorphous.

(i) Tetra phosphdecoxide(P4O10)  → Molecular

(ii) Ammonium phosphate(NH4)3PO4  → ionic

(iii) SiC → Network (Covalent)

(iv) I2 → molecular

(v) P4 → Molecular

(vi) Plastic → amorphous

(vii) Graphite → Network (Covalent)

(viii) Brass → metallic

(ix) Rb → metallic

(x) LiBR → ionic

(xi) Si → Network (Covalent)

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Join us for expert guidance, tips, and practice to excel in your CUET 2024 exam.

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🔰 Motion In A Straight Line 🔰

Motion in a straight line refers to the movement of an object along a single direction, such as along a straight path or a straight line. In physics, motion in a straight line is studied under the branch of mechanics. The following concepts are important in the study of motion in a straight line:

➖ Distance: Distance is a scalar quantity that represents the length of the path covered by an object during its motion. It is represented by the symbol "d" and has units of meters (m).

➖ Displacement: Displacement is a vector quantity that represents the change in position of an object from its initial position. It is represented by the symbol "Δd" or "d".

➖ Velocity: Velocity is the rate of change of displacement and is also a vector quantity. It is represented by the symbol "v" and has units of meters per second (m/s).

➖ Acceleration: Acceleration is the rate of change of velocity and is also a vector quantity. It is represented by the symbol "a" and has units of meters per second squared (m/s^2).

➖ Motion Equations: Motion equations are mathematical relationships that describe the motion of an object in a straight line. These equations can be used to calculate unknown quantities such as velocity, acceleration, and displacement.

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🧪 Cuet 2024 Chemistry Dose 💊

Gaseous State Laws:

1. BLT--> pronounced as BOLT, here B stands for Boyle's, L stands for Law and T stands for temperature, we know that temperature is constant in Boyles law.

2. CLP--> pronounced as CLIP, here C for Charles, L for Law and P for Pressure, we all know in Charles law pressure is constant.

3. GLV--> pronounced as GLIVE, G for gay's, L for Law and V for Volume. We all know that in Gay's law volume isconstant.                                              

✅Notes on s-Block Elements:

Physical Properties of Alkali Metals:

➖These are soft in nature and can be cut with the help of knife except the lithium. 
➖The atoms of alkali metals have the largest size in their respective periods.
➖The first ionization energy of the alkali metals are the lowest as compared to the elements in the other group.
➖The alkali metals show +1 oxidation state.
➖The alkali metals have low values of reduction potential (as shown in table-I) and therefore have a strong tendency to lose electrons and act as good reducing agents.
➖The melting and boiling points of alkali metals are very low because the intermetallic bonds in them are quite weak.

Hydroxides of Alkali Metals:

a)All the alkali metals, their oxides, peroxides and superoxides readily dissolve in water to produce corresponding hydroxides which are strong alkalies.

➖2Na + 2H2O → 2NaOH + H2                  

➖Na2O + 2H2O 2NaOH              

➖Na2O2 + 2H2O → 2NaOH + H2O2              

➖2KO2 + 2H2O → 2KOH + H2O2 + O2   

b) The basic strength of these hydroxides increases as we move  down the group Li to Cs.
c) All these hydroxides are highly soluble in water and thermally    stable except lithium hydroxide.
d) Alkali metals hydroxides being strongly basic react with all acids forming salts.

➖NaOH + HCI → NacI + H2O              
➖2NaOH + H2 SO4 → Na2SO4 + 2H2O     

Halides of Alkali metals:
➖M2O + 2HX → 2MX + H2O               
➖MOH + HX → MX + H2O              
➖M2CO3 + 2HX → 2MX + CO2 + H2O (M = Li, Na, K, Rb or Cs)

(X = F, Cl, Br or I)
➖ll the alkali metals form ionic (electrovalent) compounds.
➖The alkali metals are good conductors of heat and electricity.
➖Alkali metals (except Li) exhibit photoelectric effect
➖The alkali metals and their salts impart a characteristic colour to flame.

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