Posted on Leave a comment

Amines and Carbonyl compounds – Target Practice Questions

Scope: Amines – 6 x 5 marks

Aldehydes, ketones, carboxylic acids: 6 x 5 marks

Total = 60 marks

To complete in 120 minutes. and report in whatsapp.

Saitech Target Practice — Question Paper Card
🎯 Saitech Target Practice — Question Paper Timer Enabled Each Q = 5 marks • Max = 60
00:00
Open Paper
Answer Key: Open Solutions

Posted on Leave a comment

Electromagnetic induction formula worksheet

SaitechAI Worksheet – Electromagnetic Induction Formulae

SaitechAI Worksheet

Important Formulae – Electromagnetic Induction

Q1. State Faraday’s law of electromagnetic induction and write its formula.
ε = dφ/dt, where ε = induced emf. (Faraday’s Law)
Q2. Derive the expression for motional emf in a conductor.
ε = – B l v (Motional emf)
Q3. Find the emf developed between the ends of a rod rotating in a magnetic field.
V = ½ B ω l²
Q4. State the relation between magnetic flux and inductance.
φ = L I
Q5. Write the expression for self-induced emf in a coil.
ε = – L dI/dt
Q6. Define mutual inductance and give its formula.
ε₁ = – M₁₂ dI₂/dt
Q7. Derive the expression for self-inductance of a solenoid.
L = μr μ0 n² A l
Q8. State the emf equation of an AC generator.
e = nBAω sin ωt (ω = 2πv)
Q9. Write the expression for energy stored in an inductor.
U = ½ L I²
Total Marks: 0/20
Posted on Leave a comment

Electronic configuration worksheet

SaitechAI Worksheet — Electronic Configuration (Block Elements)

SaitechAI Worksheet — Electronic Configuration

10 problems from p-block, d-block and f-block elements

Start: End: Duration:
Q1. Boron (Z = 5, p-block)
1s² 2s² 2p¹
Q2. Nitrogen (Z = 7, p-block)
1s² 2s² 2p³
Q3. Sulfur (Z = 16, p-block)
1s² 2s² 2p⁶ 3s² 3p⁴
Q4. Bromine (Z = 35, p-block)
[Ar] 3d¹⁰ 4s² 4p⁵
Q5. Copper (Z = 29, d-block)
[Ar] 3d¹⁰ 4s¹
Q6. Zinc (Z = 30, d-block)
[Ar] 3d¹⁰ 4s²
Q7. Iron (Z = 26, d-block)
[Ar] 3d⁶ 4s²
Q8. Cerium (Z = 58, f-block)
[Xe] 4f¹ 5d¹ 6s²
Q9. Neodymium (Z = 60, f-block)
[Xe] 4f⁴ 6s²
Q10. Uranium (Z = 92, f-block)
[Rn] 5f³ 6d¹ 7s²
Score: 0/20
Blocks covered: p-block (Q1–Q4), d-block (Q5–Q7), f-block (Q8–Q10). © SaitechAI
Posted on Leave a comment

Formal Charges Worksheet

SaitechAI Worksheet – Formal Charges

SaitechAI Worksheet – Formal Charges in Chemistry

Name: Class: Roll No:
1. Calculate the formal charge of oxygen in the hydroxide ion (OH⁻).
Show/Hide Key
Key: O has 6 valence e⁻; nonbonding=6, bonding=2 → FC = 6 – 6 – (2/2) = -1.
Award 2 marks
2. Find the formal charge of nitrogen in ammonium ion (NH₄⁺).
Show/Hide Key
Key: N valence=5; nonbonding=0, bonding=8 → FC=5 – 0 – (8/2) = +1.
Award 2 marks
3. Calculate the formal charge on central C atom in CO₂.
Show/Hide Key
Key: C valence=4; nonbonding=0; bonding=8 → FC=4 – 0 – 4=0.
Award 2 marks
4. Find formal charge of oxygen in H₃O⁺ ion.
Show/Hide Key
Key: O valence=6; nonbonding=2; bonding=6 → FC=6 – 2 – 3=+1.
Award 2 marks
5. Find formal charge of each O in O₃ (ozone).
Show/Hide Key
Key: Resonance forms → terminal O: -1 and 0; central O: +1.
Award 2 marks
6. Calculate formal charge of nitrogen in NO₃⁻ ion.
Show/Hide Key
Key: N valence=5; nonbonding=0; bonding=8 → FC=5 – 0 – 4=+1.
Award 2 marks
7. Calculate formal charge of chlorine in ClO₄⁻ ion.
Show/Hide Key
Key: Cl valence=7; bonding=8; FC=7 – 0 – 4=+3 (resonance spread).
Award 2 marks
8. Find formal charge of carbon in CN⁻ ion.
Show/Hide Key
Key: C valence=4; nonbonding=2; bonding=6 → FC=4 – 2 – 3=-1.
Award 2 marks
9. Find formal charge of nitrogen in NO₂⁻ ion.
Show/Hide Key
Key: N valence=5; bonding=7; nonbonding=0 → FC=5 – 0 – 3.5=+1.5 (delocalized).
Award 2 marks
10. Calculate formal charge of phosphorus in phosphate ion (PO₄³⁻).
Show/Hide Key
Key: P valence=5; bonding=8; nonbonding=0 → FC=5 – 0 – 4=+1.
Award 2 marks
Total Score: 0 / 20
Posted on Leave a comment

Python Short Programs Worksheets

SaitechAI • Python Programming Worksheet (Weighted Marks)
SaitechAI • Worksheet

Python Programming Worksheet — 10 Short Questions

Write your script in the box for each question. Tick “Correct” after verification. Use Show Key to reveal solutions. Weighted total: 20 marks.

Q1. Print the first 10 natural numbers using a loop.
Print numbers 1 to 10 on one line separated by spaces.
Key:
for i in range(1,11):
    print(i, end=" ")
Q2. Function to check if a number is even or odd.
Key:
def is_even(n: int) -> bool:
    return n % 2 == 0
Q3. Largest number in a list (no max()).
Key:
nums = [12, 4, 29, 7, -1]
m = nums[0]
for x in nums[1:]:
    if x > m:
        m = x
print(m)
Q4. Factorial using recursion with base cases 0 and 1.
Key:
def fact(n: int) -> int:
    return 1 if n <= 1 else n * fact(n-1)
Q5. Reverse a string input by the user.
Key:
s = input().strip()
print(s[::-1])
Q6. Multiplication table of a number up to 10.
Key:
n = int(input())
for i in range(1, 11):
    print(f"{n} x {i} = {n*i}")
Q7. Palindrome check ignoring case and spaces.
Key:
t = ''.join(ch.lower() for ch in input() if not ch.isspace())
print("Palindrome" if t == t[::-1] else "Not palindrome")
Q8. Count vowels (a, e, i, o, u) in a string.
Key:
s = input().lower()
print(sum(ch in "aeiou" for ch in s))
Q9. Swap two variables without using a third variable.
Key:
a, b = 5, 9
a, b = b, a
print(a, b)
Q10. Sum of all elements in a list read from a line of input.
Key:
nums = list(map(int, input().split()))
total = 0
for x in nums:
    total += x
print(total)
Total Score: 0 / 20
Posted on Leave a comment

pH and pOH Worksheet

SaitechAI

pH & pOH – 15 Problems Worksheet

Enter answers with 2–3 significant digits unless stated.

Score: 0 / 15
Answer Key & Explanations (Hidden)

Rounding: Unless specified, give answers to 2 decimal places. Use 25 °C (Kw = 1.0×10−14).

© SaitechAI – Worksheet Card Style

Posted on Leave a comment

Log and antilog Worksheets

Student should work out these worksheets in their notebook and enter the answers online. Get them corrected. Print the score as pdf and send it to the faculty.

Decimal Operations Worksheet — Multiplication • Division • Powers • Roots
SaitechAI
Enter answers → click Check Answers for instant corrections & score. Reveal full key only after solving.
Multiplication0/6
Division0/6
Powers0/6
Roots0/6
Total0/24

Multiplication (6 problems)

    Division (6 problems)

      Powers (6 problems)

        Roots (6 problems)

          © SaitechAI • Auto-correction with tolerance ±0.001; hidden key for verification.

          Use the Log and antilog calculator

          Posted on Leave a comment

          Logarithm practice Worksheet

          Logarithm Worksheet – SaitechAI Topic Card

          SaitechAI Worksheet: Logarithm to Base 10 using Log Table

          Instruction: Use the logarithm table to find the values of the following logarithms. Round answers to 4 decimal places.
          Q1. log10(2.345)
          Q2. log10(0.0547)
          Q3. log10(18.92)
          Q4. log10(245.6)
          Q5. log10(6.022 × 1023)
          Q6. log10(3.16 × 10-4)
          Q7. log10(√25)
          Q8. log10(√0.0081)
          Q9. log10(7.772)
          Q10. log10(0.000347)
          Q11. log10(5.5 × 107)
          Q12. log10(9.81 × 10-2)

          Answer Key

          Q1. log10(2.345) ≈ 0.3707
          Q2. log10(0.0547) ≈ -1.2619
          Q3. log10(18.92) ≈ 1.2765
          Q4. log10(245.6) ≈ 2.3908
          Q5. log10(6.022 × 1023) ≈ 23.7796
          Q6. log10(3.16 × 10-4) ≈ -3.5004
          Q7. log10(√25) = log10(5) ≈ 0.6990
          Q8. log10(√0.0081) = log10(0.09) ≈ -1.0458
          Q9. log10(7.772) = 2 log10(7.77) ≈ 1.7791
          Q10. log10(0.000347) ≈ -3.4597
          Q11. log10(5.5 × 107) ≈ 7.7404
          Q12. log10(9.81 × 10-2) ≈ -1.0086