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Lesson # 4
Adding & Switching Networks in Wallets
Blockchain Basics
1. What is the primary benefit of using Chainlist.org?
A. It gives free airdrops for added networks
B. It allows you to quickly and safely add EVM-compatible networks to MetaMask
C. It mines crypto for your wallet
D. It resets your MetaMask wallet to default settings
2. What is the Chain ID for Binance Smart Chain (BSC)?
A. 250
B. 137
C. 56
D. 10
3. If you see the error “Invalid JSON-RPC response” in MetaMask, what should you do first?
A. Clear browser cookies
B. Delete MetaMask
C. Check the RPC URL for typos or try a different one
D. Format your computer
4. Which of the following is NOT required when manually adding a custom network to MetaMask?
A. RPC URL
B. Your seed phrase
C. Chain ID
D. Network name
5. Why is it important to add networks like Arbitrum or Optimism to your wallet?
A. To get free NFTs automatically
B. To stake ETH directly
C. To interact with Layer 2 dApps, DeFi protocols, and potential airdrops
D. To upgrade MetaMask to a premium version